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Finding the Fourth Proportional to 315.92, 474.21 and 224.79

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Solution

The fourth proportional to 315.92, 474.21 and 224.79 is: 337.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.92 : 474.21 = 224.79 : x
  2. Step 2: Convert to fraction form
    315.92/474.21 = 224.79/x
  3. Step 3: Cross multiply
    315.92x = 474.21 × 224.79
  4. Step 4: Simplify right side
    315.92x = 106,597.67
  5. Step 5: Solve for x
    x = 106,597.67/315.92
  6. Step 6: Final answer
    x = 337.43

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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.