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Finding the Fourth Proportional to 641,104.80, 961,657.20 and 267,079.20

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Solution

The fourth proportional to 641,104.80, 961,657.20 and 267,079.20 is: 400,618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,104.80 : 961,657.20 = 267,079.20 : x
  2. Step 2: Convert to fraction form
    641,104.80/961,657.20 = 267,079.20/x
  3. Step 3: Cross multiply
    641,104.80x = 961,657.20 × 267,079.20
  4. Step 4: Simplify right side
    641,104.80x = 256,838,635,650.24
  5. Step 5: Solve for x
    x = 256,838,635,650.24/641,104.80
  6. Step 6: Final answer
    x = 400,618.80

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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.