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Finding the Fourth Proportional to 224.69, 338.65 and 212.13

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Solution

The fourth proportional to 224.69, 338.65 and 212.13 is: 319.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.69 : 338.65 = 212.13 : x
  2. Step 2: Convert to fraction form
    224.69/338.65 = 212.13/x
  3. Step 3: Cross multiply
    224.69x = 338.65 × 212.13
  4. Step 4: Simplify right side
    224.69x = 71,838.14
  5. Step 5: Solve for x
    x = 71,838.14/224.69
  6. Step 6: Final answer
    x = 319.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.