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Finding the Fourth Proportional to 283,654.80, 391,446 and 156,330.72

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Solution

The fourth proportional to 283,654.80, 391,446 and 156,330.72 is: 215,737.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,654.80 : 391,446 = 156,330.72 : x
  2. Step 2: Convert to fraction form
    283,654.80/391,446 = 156,330.72/x
  3. Step 3: Cross multiply
    283,654.80x = 391,446 × 156,330.72
  4. Step 4: Simplify right side
    283,654.80x = 61,195,035,021.12
  5. Step 5: Solve for x
    x = 61,195,035,021.12/283,654.80
  6. Step 6: Final answer
    x = 215,737.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.