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Finding the Fourth Proportional to 438,207.60, 656,857.80 and 238,105.20

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Solution

The fourth proportional to 438,207.60, 656,857.80 and 238,105.20 is: 356,911.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,207.60 : 656,857.80 = 238,105.20 : x
  2. Step 2: Convert to fraction form
    438,207.60/656,857.80 = 238,105.20/x
  3. Step 3: Cross multiply
    438,207.60x = 656,857.80 × 238,105.20
  4. Step 4: Simplify right side
    438,207.60x = 156,401,257,840.56
  5. Step 5: Solve for x
    x = 156,401,257,840.56/438,207.60
  6. Step 6: Final answer
    x = 356,911.33

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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.