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Finding the Fourth Proportional to 653.38, 980.13 and 166.43

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Solution

The fourth proportional to 653.38, 980.13 and 166.43 is: 249.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.38 : 980.13 = 166.43 : x
  2. Step 2: Convert to fraction form
    653.38/980.13 = 166.43/x
  3. Step 3: Cross multiply
    653.38x = 980.13 × 166.43
  4. Step 4: Simplify right side
    653.38x = 163,121.95
  5. Step 5: Solve for x
    x = 163,121.95/653.38
  6. Step 6: Final answer
    x = 249.66

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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.