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Finding the Fourth Proportional to 170.92, 256.03 and 149.28

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Solution

The fourth proportional to 170.92, 256.03 and 149.28 is: 223.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.92 : 256.03 = 149.28 : x
  2. Step 2: Convert to fraction form
    170.92/256.03 = 149.28/x
  3. Step 3: Cross multiply
    170.92x = 256.03 × 149.28
  4. Step 4: Simplify right side
    170.92x = 38,218.83
  5. Step 5: Solve for x
    x = 38,218.83/170.92
  6. Step 6: Final answer
    x = 223.60

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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.