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Finding the Fourth Proportional to 485,779.90, 728,669.85 and 454,287.10

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Solution

The fourth proportional to 485,779.90, 728,669.85 and 454,287.10 is: 681,430.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,779.90 : 728,669.85 = 454,287.10 : x
  2. Step 2: Convert to fraction form
    485,779.90/728,669.85 = 454,287.10/x
  3. Step 3: Cross multiply
    485,779.90x = 728,669.85 × 454,287.10
  4. Step 4: Simplify right side
    485,779.90x = 331,025,313,013.94
  5. Step 5: Solve for x
    x = 331,025,313,013.94/485,779.90
  6. Step 6: Final answer
    x = 681,430.65

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.