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Finding the Fourth Proportional to 178.28, 266.29 and 149.20

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Solution

The fourth proportional to 178.28, 266.29 and 149.20 is: 222.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.28 : 266.29 = 149.20 : x
  2. Step 2: Convert to fraction form
    178.28/266.29 = 149.20/x
  3. Step 3: Cross multiply
    178.28x = 266.29 × 149.20
  4. Step 4: Simplify right side
    178.28x = 39,730.47
  5. Step 5: Solve for x
    x = 39,730.47/178.28
  6. Step 6: Final answer
    x = 222.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.