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Finding the Fourth Proportional to 409.20, 614.07 and 178.31

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Solution

The fourth proportional to 409.20, 614.07 and 178.31 is: 267.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.20 : 614.07 = 178.31 : x
  2. Step 2: Convert to fraction form
    409.20/614.07 = 178.31/x
  3. Step 3: Cross multiply
    409.20x = 614.07 × 178.31
  4. Step 4: Simplify right side
    409.20x = 109,491.75
  5. Step 5: Solve for x
    x = 109,491.75/409.20
  6. Step 6: Final answer
    x = 267.58

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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.