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Finding the Fourth Proportional to 479.31, 718.75 and 171.17

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Solution

The fourth proportional to 479.31, 718.75 and 171.17 is: 256.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.31 : 718.75 = 171.17 : x
  2. Step 2: Convert to fraction form
    479.31/718.75 = 171.17/x
  3. Step 3: Cross multiply
    479.31x = 718.75 × 171.17
  4. Step 4: Simplify right side
    479.31x = 123,028.44
  5. Step 5: Solve for x
    x = 123,028.44/479.31
  6. Step 6: Final answer
    x = 256.68

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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.