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Finding the Fourth Proportional to 170.72, 254.80 and 147.48

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Solution

The fourth proportional to 170.72, 254.80 and 147.48 is: 220.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.72 : 254.80 = 147.48 : x
  2. Step 2: Convert to fraction form
    170.72/254.80 = 147.48/x
  3. Step 3: Cross multiply
    170.72x = 254.80 × 147.48
  4. Step 4: Simplify right side
    170.72x = 37,577.90
  5. Step 5: Solve for x
    x = 37,577.90/170.72
  6. Step 6: Final answer
    x = 220.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.