Home / 1,380,745,060.87-1,905,428,111.13-745,665,491.56

Finding the Fourth Proportional to 1,380,745,060.87, 1,905,428,111.13 and 745,665,491.56

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Solution

The fourth proportional to 1,380,745,060.87, 1,905,428,111.13 and 745,665,491.56 is: 1,029,018,339.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,745,060.87 : 1,905,428,111.13 = 745,665,491.56 : x
  2. Step 2: Convert to fraction form
    1,380,745,060.87/1,905,428,111.13 = 745,665,491.56/x
  3. Step 3: Cross multiply
    1,380,745,060.87x = 1,905,428,111.13 × 745,665,491.56
  4. Step 4: Simplify right side
    1,380,745,060.87x = 1,420,811,989,117,993,728
  5. Step 5: Solve for x
    x = 1,420,811,989,117,993,728/1,380,745,060.87
  6. Step 6: Final answer
    x = 1,029,018,339.00

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Half scale
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Double scale
Find fourth proportional to 1,380,745,061.87, 1,905,428,112.51 and 745,665,492.56
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.