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Finding the Fourth Proportional to 180.66, 249.12 and 155.84

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Solution

The fourth proportional to 180.66, 249.12 and 155.84 is: 214.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.66 : 249.12 = 155.84 : x
  2. Step 2: Convert to fraction form
    180.66/249.12 = 155.84/x
  3. Step 3: Cross multiply
    180.66x = 249.12 × 155.84
  4. Step 4: Simplify right side
    180.66x = 38,822.86
  5. Step 5: Solve for x
    x = 38,822.86/180.66
  6. Step 6: Final answer
    x = 214.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.