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Finding the Fourth Proportional to 664,487.78, 996,829.49 and 215,059.28

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Solution

The fourth proportional to 664,487.78, 996,829.49 and 215,059.28 is: 322,620.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,487.78 : 996,829.49 = 215,059.28 : x
  2. Step 2: Convert to fraction form
    664,487.78/996,829.49 = 215,059.28/x
  3. Step 3: Cross multiply
    664,487.78x = 996,829.49 × 215,059.28
  4. Step 4: Simplify right side
    664,487.78x = 214,377,432,402.17
  5. Step 5: Solve for x
    x = 214,377,432,402.17/664,487.78
  6. Step 6: Final answer
    x = 322,620.58

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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.