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Finding the Fourth Proportional to 402.20, 602.84 and 158.60

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Solution

The fourth proportional to 402.20, 602.84 and 158.60 is: 237.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.20 : 602.84 = 158.60 : x
  2. Step 2: Convert to fraction form
    402.20/602.84 = 158.60/x
  3. Step 3: Cross multiply
    402.20x = 602.84 × 158.60
  4. Step 4: Simplify right side
    402.20x = 95,610.42
  5. Step 5: Solve for x
    x = 95,610.42/402.20
  6. Step 6: Final answer
    x = 237.72

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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.