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Finding the Fourth Proportional to 482,755.20, 724,132.80 and 315,638.40

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Solution

The fourth proportional to 482,755.20, 724,132.80 and 315,638.40 is: 473,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,755.20 : 724,132.80 = 315,638.40 : x
  2. Step 2: Convert to fraction form
    482,755.20/724,132.80 = 315,638.40/x
  3. Step 3: Cross multiply
    482,755.20x = 724,132.80 × 315,638.40
  4. Step 4: Simplify right side
    482,755.20x = 228,564,118,379.52
  5. Step 5: Solve for x
    x = 228,564,118,379.52/482,755.20
  6. Step 6: Final answer
    x = 473,457.60

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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.