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Finding the Fourth Proportional to 178.80, 266.90 and 155.84

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Solution

The fourth proportional to 178.80, 266.90 and 155.84 is: 232.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.80 : 266.90 = 155.84 : x
  2. Step 2: Convert to fraction form
    178.80/266.90 = 155.84/x
  3. Step 3: Cross multiply
    178.80x = 266.90 × 155.84
  4. Step 4: Simplify right side
    178.80x = 41,593.70
  5. Step 5: Solve for x
    x = 41,593.70/178.80
  6. Step 6: Final answer
    x = 232.63

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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.