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Finding the Fourth Proportional to 436.42, 654.23 and 147.66

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Solution

The fourth proportional to 436.42, 654.23 and 147.66 is: 221.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.42 : 654.23 = 147.66 : x
  2. Step 2: Convert to fraction form
    436.42/654.23 = 147.66/x
  3. Step 3: Cross multiply
    436.42x = 654.23 × 147.66
  4. Step 4: Simplify right side
    436.42x = 96,600.69
  5. Step 5: Solve for x
    x = 96,600.69/436.42
  6. Step 6: Final answer
    x = 221.35

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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.