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Finding the Fourth Proportional to 436.31, 654.50 and 147.75

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Solution

The fourth proportional to 436.31, 654.50 and 147.75 is: 221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.31 : 654.50 = 147.75 : x
  2. Step 2: Convert to fraction form
    436.31/654.50 = 147.75/x
  3. Step 3: Cross multiply
    436.31x = 654.50 × 147.75
  4. Step 4: Simplify right side
    436.31x = 96,702.38
  5. Step 5: Solve for x
    x = 96,702.38/436.31
  6. Step 6: Final answer
    x = 221.64

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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.