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Finding the Fourth Proportional to 436.52, 654.71 and 111.87

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Solution

The fourth proportional to 436.52, 654.71 and 111.87 is: 167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.52 : 654.71 = 111.87 : x
  2. Step 2: Convert to fraction form
    436.52/654.71 = 111.87/x
  3. Step 3: Cross multiply
    436.52x = 654.71 × 111.87
  4. Step 4: Simplify right side
    436.52x = 73,241.85
  5. Step 5: Solve for x
    x = 73,241.85/436.52
  6. Step 6: Final answer
    x = 167.79

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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.