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Finding the Fourth Proportional to 485,613.20, 729,294.60 and 469,866.80

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Solution

The fourth proportional to 485,613.20, 729,294.60 and 469,866.80 is: 705,646.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,613.20 : 729,294.60 = 469,866.80 : x
  2. Step 2: Convert to fraction form
    485,613.20/729,294.60 = 469,866.80/x
  3. Step 3: Cross multiply
    485,613.20x = 729,294.60 × 469,866.80
  4. Step 4: Simplify right side
    485,613.20x = 342,671,319,959.28
  5. Step 5: Solve for x
    x = 342,671,319,959.28/485,613.20
  6. Step 6: Final answer
    x = 705,646.63

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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.