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Finding the Fourth Proportional to 316.68, 473.98 and 171.72

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Solution

The fourth proportional to 316.68, 473.98 and 171.72 is: 257.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.68 : 473.98 = 171.72 : x
  2. Step 2: Convert to fraction form
    316.68/473.98 = 171.72/x
  3. Step 3: Cross multiply
    316.68x = 473.98 × 171.72
  4. Step 4: Simplify right side
    316.68x = 81,391.85
  5. Step 5: Solve for x
    x = 81,391.85/316.68
  6. Step 6: Final answer
    x = 257.02

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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.