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Finding the Fourth Proportional to 485,721.60, 728,265.60 and 435,955.20

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Solution

The fourth proportional to 485,721.60, 728,265.60 and 435,955.20 is: 653,648.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,721.60 : 728,265.60 = 435,955.20 : x
  2. Step 2: Convert to fraction form
    485,721.60/728,265.60 = 435,955.20/x
  3. Step 3: Cross multiply
    485,721.60x = 728,265.60 × 435,955.20
  4. Step 4: Simplify right side
    485,721.60x = 317,491,175,301.12
  5. Step 5: Solve for x
    x = 317,491,175,301.12/485,721.60
  6. Step 6: Final answer
    x = 653,648.46

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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.