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Finding the Fourth Proportional to 223.57, 308.45 and 125.30

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Solution

The fourth proportional to 223.57, 308.45 and 125.30 is: 172.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.57 : 308.45 = 125.30 : x
  2. Step 2: Convert to fraction form
    223.57/308.45 = 125.30/x
  3. Step 3: Cross multiply
    223.57x = 308.45 × 125.30
  4. Step 4: Simplify right side
    223.57x = 38,649.24
  5. Step 5: Solve for x
    x = 38,649.24/223.57
  6. Step 6: Final answer
    x = 172.88

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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.