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Finding the Fourth Proportional to 482,963.40, 724,445.10 and 445,638.60

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Solution

The fourth proportional to 482,963.40, 724,445.10 and 445,638.60 is: 668,457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,963.40 : 724,445.10 = 445,638.60 : x
  2. Step 2: Convert to fraction form
    482,963.40/724,445.10 = 445,638.60/x
  3. Step 3: Cross multiply
    482,963.40x = 724,445.10 × 445,638.60
  4. Step 4: Simplify right side
    482,963.40x = 322,840,700,140.86
  5. Step 5: Solve for x
    x = 322,840,700,140.86/482,963.40
  6. Step 6: Final answer
    x = 668,457.90

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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.