Home / 1,252,457,839.46-1,728,692,839.38-716,919,948.30

Finding the Fourth Proportional to 1,252,457,839.46, 1,728,692,839.38 and 716,919,948.30

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Solution

The fourth proportional to 1,252,457,839.46, 1,728,692,839.38 and 716,919,948.30 is: 989,521,836.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252,457,839.46 : 1,728,692,839.38 = 716,919,948.30 : x
  2. Step 2: Convert to fraction form
    1,252,457,839.46/1,728,692,839.38 = 716,919,948.30/x
  3. Step 3: Cross multiply
    1,252,457,839.46x = 1,728,692,839.38 × 716,919,948.30
  4. Step 4: Simplify right side
    1,252,457,839.46x = 1,239,334,381,034,889,728
  5. Step 5: Solve for x
    x = 1,239,334,381,034,889,728/1,252,457,839.46
  6. Step 6: Final answer
    x = 989,521,836.18

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Half scale
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Double scale
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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.