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Finding the Fourth Proportional to 213.60, 294.80 and 126.28

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Solution

The fourth proportional to 213.60, 294.80 and 126.28 is: 174.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.60 : 294.80 = 126.28 : x
  2. Step 2: Convert to fraction form
    213.60/294.80 = 126.28/x
  3. Step 3: Cross multiply
    213.60x = 294.80 × 126.28
  4. Step 4: Simplify right side
    213.60x = 37,227.34
  5. Step 5: Solve for x
    x = 37,227.34/213.60
  6. Step 6: Final answer
    x = 174.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.