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Finding the Fourth Proportional to 284,460.72, 426,691.20 and 74,119.92

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Solution

The fourth proportional to 284,460.72, 426,691.20 and 74,119.92 is: 111,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,460.72 : 426,691.20 = 74,119.92 : x
  2. Step 2: Convert to fraction form
    284,460.72/426,691.20 = 74,119.92/x
  3. Step 3: Cross multiply
    284,460.72x = 426,691.20 × 74,119.92
  4. Step 4: Simplify right side
    284,460.72x = 31,626,317,608.70
  5. Step 5: Solve for x
    x = 31,626,317,608.70/284,460.72
  6. Step 6: Final answer
    x = 111,179.91

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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.