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Finding the Fourth Proportional to 316.46, 474.35 and 171.88

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Solution

The fourth proportional to 316.46, 474.35 and 171.88 is: 257.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.46 : 474.35 = 171.88 : x
  2. Step 2: Convert to fraction form
    316.46/474.35 = 171.88/x
  3. Step 3: Cross multiply
    316.46x = 474.35 × 171.88
  4. Step 4: Simplify right side
    316.46x = 81,531.28
  5. Step 5: Solve for x
    x = 81,531.28/316.46
  6. Step 6: Final answer
    x = 257.64

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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.