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Finding the Fourth Proportional to 316.44, 474.75 and 225.72

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Solution

The fourth proportional to 316.44, 474.75 and 225.72 is: 338.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.44 : 474.75 = 225.72 : x
  2. Step 2: Convert to fraction form
    316.44/474.75 = 225.72/x
  3. Step 3: Cross multiply
    316.44x = 474.75 × 225.72
  4. Step 4: Simplify right side
    316.44x = 107,160.57
  5. Step 5: Solve for x
    x = 107,160.57/316.44
  6. Step 6: Final answer
    x = 338.64

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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.