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Finding the Fourth Proportional to 239.68, 359.72 and 178.04

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Solution

The fourth proportional to 239.68, 359.72 and 178.04 is: 267.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.68 : 359.72 = 178.04 : x
  2. Step 2: Convert to fraction form
    239.68/359.72 = 178.04/x
  3. Step 3: Cross multiply
    239.68x = 359.72 × 178.04
  4. Step 4: Simplify right side
    239.68x = 64,044.55
  5. Step 5: Solve for x
    x = 64,044.55/239.68
  6. Step 6: Final answer
    x = 267.21

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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.