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Finding the Fourth Proportional to 207.57, 310.95 and 171.39

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Solution

The fourth proportional to 207.57, 310.95 and 171.39 is: 256.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.57 : 310.95 = 171.39 : x
  2. Step 2: Convert to fraction form
    207.57/310.95 = 171.39/x
  3. Step 3: Cross multiply
    207.57x = 310.95 × 171.39
  4. Step 4: Simplify right side
    207.57x = 53,293.72
  5. Step 5: Solve for x
    x = 53,293.72/207.57
  6. Step 6: Final answer
    x = 256.75

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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.