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Finding the Fourth Proportional to 316.68, 474.62 and 225.40

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Solution

The fourth proportional to 316.68, 474.62 and 225.40 is: 337.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.68 : 474.62 = 225.40 : x
  2. Step 2: Convert to fraction form
    316.68/474.62 = 225.40/x
  3. Step 3: Cross multiply
    316.68x = 474.62 × 225.40
  4. Step 4: Simplify right side
    316.68x = 106,979.35
  5. Step 5: Solve for x
    x = 106,979.35/316.68
  6. Step 6: Final answer
    x = 337.82

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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.