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Finding the Fourth Proportional to 436.53, 654.67 and 135.88

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Solution

The fourth proportional to 436.53, 654.67 and 135.88 is: 203.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.53 : 654.67 = 135.88 : x
  2. Step 2: Convert to fraction form
    436.53/654.67 = 135.88/x
  3. Step 3: Cross multiply
    436.53x = 654.67 × 135.88
  4. Step 4: Simplify right side
    436.53x = 88,956.56
  5. Step 5: Solve for x
    x = 88,956.56/436.53
  6. Step 6: Final answer
    x = 203.78

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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.