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Finding the Fourth Proportional to 178.35, 266.99 and 145.55

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Solution

The fourth proportional to 178.35, 266.99 and 145.55 is: 217.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.35 : 266.99 = 145.55 : x
  2. Step 2: Convert to fraction form
    178.35/266.99 = 145.55/x
  3. Step 3: Cross multiply
    178.35x = 266.99 × 145.55
  4. Step 4: Simplify right side
    178.35x = 38,858.33
  5. Step 5: Solve for x
    x = 38,858.33/178.35
  6. Step 6: Final answer
    x = 217.88

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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.