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Finding the Fourth Proportional to 316.41, 474.82 and 121.57

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Solution

The fourth proportional to 316.41, 474.82 and 121.57 is: 182.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.41 : 474.82 = 121.57 : x
  2. Step 2: Convert to fraction form
    316.41/474.82 = 121.57/x
  3. Step 3: Cross multiply
    316.41x = 474.82 × 121.57
  4. Step 4: Simplify right side
    316.41x = 57,722.72
  5. Step 5: Solve for x
    x = 57,722.72/316.41
  6. Step 6: Final answer
    x = 182.43

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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.