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Finding the Fourth Proportional to 491,439.78, 737,123.67 and 191,863.62

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Solution

The fourth proportional to 491,439.78, 737,123.67 and 191,863.62 is: 287,781.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,439.78 : 737,123.67 = 191,863.62 : x
  2. Step 2: Convert to fraction form
    491,439.78/737,123.67 = 191,863.62/x
  3. Step 3: Cross multiply
    491,439.78x = 737,123.67 × 191,863.62
  4. Step 4: Simplify right side
    491,439.78x = 141,427,215,713.89
  5. Step 5: Solve for x
    x = 141,427,215,713.89/491,439.78
  6. Step 6: Final answer
    x = 287,781.38

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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.