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Finding the Fourth Proportional to 664,472.70, 996,854.85 and 215,117.10

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Solution

The fourth proportional to 664,472.70, 996,854.85 and 215,117.10 is: 322,722.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,472.70 : 996,854.85 = 215,117.10 : x
  2. Step 2: Convert to fraction form
    664,472.70/996,854.85 = 215,117.10/x
  3. Step 3: Cross multiply
    664,472.70x = 996,854.85 × 215,117.10
  4. Step 4: Simplify right side
    664,472.70x = 214,440,524,452.94
  5. Step 5: Solve for x
    x = 214,440,524,452.94/664,472.70
  6. Step 6: Final answer
    x = 322,722.85

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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.