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Finding the Fourth Proportional to 285,627.30, 428,246.55 and 135,939.30

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Solution

The fourth proportional to 285,627.30, 428,246.55 and 135,939.30 is: 203,816.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,627.30 : 428,246.55 = 135,939.30 : x
  2. Step 2: Convert to fraction form
    285,627.30/428,246.55 = 135,939.30/x
  3. Step 3: Cross multiply
    285,627.30x = 428,246.55 × 135,939.30
  4. Step 4: Simplify right side
    285,627.30x = 58,215,536,234.42
  5. Step 5: Solve for x
    x = 58,215,536,234.42/285,627.30
  6. Step 6: Final answer
    x = 203,816.43

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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.