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Finding the Fourth Proportional to 170.10, 253.89 and 147.42

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Solution

The fourth proportional to 170.10, 253.89 and 147.42 is: 220.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.10 : 253.89 = 147.42 : x
  2. Step 2: Convert to fraction form
    170.10/253.89 = 147.42/x
  3. Step 3: Cross multiply
    170.10x = 253.89 × 147.42
  4. Step 4: Simplify right side
    170.10x = 37,428.46
  5. Step 5: Solve for x
    x = 37,428.46/170.10
  6. Step 6: Final answer
    x = 220.04

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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.