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Finding the Fourth Proportional to 239, 357.86 and 170.16

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Solution

The fourth proportional to 239, 357.86 and 170.16 is: 254.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    239 : 357.86 = 170.16 : x
  2. Step 2: Convert to fraction form
    239/357.86 = 170.16/x
  3. Step 3: Cross multiply
    239x = 357.86 × 170.16
  4. Step 4: Simplify right side
    239x = 60,893.46
  5. Step 5: Solve for x
    x = 60,893.46/239
  6. Step 6: Final answer
    x = 254.78

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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.