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Finding the Fourth Proportional to 239.56, 357.68 and 170.57

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Solution

The fourth proportional to 239.56, 357.68 and 170.57 is: 254.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.56 : 357.68 = 170.57 : x
  2. Step 2: Convert to fraction form
    239.56/357.68 = 170.57/x
  3. Step 3: Cross multiply
    239.56x = 357.68 × 170.57
  4. Step 4: Simplify right side
    239.56x = 61,010.80
  5. Step 5: Solve for x
    x = 61,010.80/239.56
  6. Step 6: Final answer
    x = 254.68

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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.