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Finding the Fourth Proportional to 214.38, 295.84 and 136.80

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Solution

The fourth proportional to 214.38, 295.84 and 136.80 is: 188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.38 : 295.84 = 136.80 : x
  2. Step 2: Convert to fraction form
    214.38/295.84 = 136.80/x
  3. Step 3: Cross multiply
    214.38x = 295.84 × 136.80
  4. Step 4: Simplify right side
    214.38x = 40,470.91
  5. Step 5: Solve for x
    x = 40,470.91/214.38
  6. Step 6: Final answer
    x = 188.78

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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.