Home / 1,398,638,281.23-1,930,126,992.87-772,111,857.51

Finding the Fourth Proportional to 1,398,638,281.23, 1,930,126,992.87 and 772,111,857.51

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Solution

The fourth proportional to 1,398,638,281.23, 1,930,126,992.87 and 772,111,857.51 is: 1,065,517,766.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,638,281.23 : 1,930,126,992.87 = 772,111,857.51 : x
  2. Step 2: Convert to fraction form
    1,398,638,281.23/1,930,126,992.87 = 772,111,857.51/x
  3. Step 3: Cross multiply
    1,398,638,281.23x = 1,930,126,992.87 × 772,111,857.51
  4. Step 4: Simplify right side
    1,398,638,281.23x = 1,490,273,937,695,046,144
  5. Step 5: Solve for x
    x = 1,490,273,937,695,046,144/1,398,638,281.23
  6. Step 6: Final answer
    x = 1,065,517,766.60

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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.