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Finding the Fourth Proportional to 543,640.92, 815,397.96 and 144,312.72

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Solution

The fourth proportional to 543,640.92, 815,397.96 and 144,312.72 is: 216,452.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,640.92 : 815,397.96 = 144,312.72 : x
  2. Step 2: Convert to fraction form
    543,640.92/815,397.96 = 144,312.72/x
  3. Step 3: Cross multiply
    543,640.92x = 815,397.96 × 144,312.72
  4. Step 4: Simplify right side
    543,640.92x = 117,672,297,490.05
  5. Step 5: Solve for x
    x = 117,672,297,490.05/543,640.92
  6. Step 6: Final answer
    x = 216,452.24

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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.