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Finding the Fourth Proportional to 543,440.85, 815,160.60 and 206,400.92

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Solution

The fourth proportional to 543,440.85, 815,160.60 and 206,400.92 is: 309,601.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,440.85 : 815,160.60 = 206,400.92 : x
  2. Step 2: Convert to fraction form
    543,440.85/815,160.60 = 206,400.92/x
  3. Step 3: Cross multiply
    543,440.85x = 815,160.60 × 206,400.92
  4. Step 4: Simplify right side
    543,440.85x = 168,249,897,787.75
  5. Step 5: Solve for x
    x = 168,249,897,787.75/543,440.85
  6. Step 6: Final answer
    x = 309,601.12

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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.