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Finding the Fourth Proportional to 485,617.20, 728,425.80 and 373,513.20

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Solution

The fourth proportional to 485,617.20, 728,425.80 and 373,513.20 is: 560,269.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,617.20 : 728,425.80 = 373,513.20 : x
  2. Step 2: Convert to fraction form
    485,617.20/728,425.80 = 373,513.20/x
  3. Step 3: Cross multiply
    485,617.20x = 728,425.80 × 373,513.20
  4. Step 4: Simplify right side
    485,617.20x = 272,076,651,520.56
  5. Step 5: Solve for x
    x = 272,076,651,520.56/485,617.20
  6. Step 6: Final answer
    x = 560,269.80

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Similar ratio
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1.5x scale

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.