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Finding the Fourth Proportional to 297,915.78, 446,621.72 and 129,309.38

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Solution

The fourth proportional to 297,915.78, 446,621.72 and 129,309.38 is: 193,854.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,915.78 : 446,621.72 = 129,309.38 : x
  2. Step 2: Convert to fraction form
    297,915.78/446,621.72 = 129,309.38/x
  3. Step 3: Cross multiply
    297,915.78x = 446,621.72 × 129,309.38
  4. Step 4: Simplify right side
    297,915.78x = 57,752,377,707.73
  5. Step 5: Solve for x
    x = 57,752,377,707.73/297,915.78
  6. Step 6: Final answer
    x = 193,854.71

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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.