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Finding the Fourth Proportional to 436.20, 654.28 and 147.63

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Solution

The fourth proportional to 436.20, 654.28 and 147.63 is: 221.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.20 : 654.28 = 147.63 : x
  2. Step 2: Convert to fraction form
    436.20/654.28 = 147.63/x
  3. Step 3: Cross multiply
    436.20x = 654.28 × 147.63
  4. Step 4: Simplify right side
    436.20x = 96,591.36
  5. Step 5: Solve for x
    x = 96,591.36/436.20
  6. Step 6: Final answer
    x = 221.44

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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.