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Finding the Fourth Proportional to 170.98, 257.38 and 148.66

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Solution

The fourth proportional to 170.98, 257.38 and 148.66 is: 223.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.98 : 257.38 = 148.66 : x
  2. Step 2: Convert to fraction form
    170.98/257.38 = 148.66/x
  3. Step 3: Cross multiply
    170.98x = 257.38 × 148.66
  4. Step 4: Simplify right side
    170.98x = 38,262.11
  5. Step 5: Solve for x
    x = 38,262.11/170.98
  6. Step 6: Final answer
    x = 223.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.