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Finding the Fourth Proportional to 223.69, 308.66 and 125.45

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Solution

The fourth proportional to 223.69, 308.66 and 125.45 is: 173.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.69 : 308.66 = 125.45 : x
  2. Step 2: Convert to fraction form
    223.69/308.66 = 125.45/x
  3. Step 3: Cross multiply
    223.69x = 308.66 × 125.45
  4. Step 4: Simplify right side
    223.69x = 38,721.40
  5. Step 5: Solve for x
    x = 38,721.40/223.69
  6. Step 6: Final answer
    x = 173.10

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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.