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Finding the Fourth Proportional to 223.50, 308.43 and 149.70

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Solution

The fourth proportional to 223.50, 308.43 and 149.70 is: 206.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.50 : 308.43 = 149.70 : x
  2. Step 2: Convert to fraction form
    223.50/308.43 = 149.70/x
  3. Step 3: Cross multiply
    223.50x = 308.43 × 149.70
  4. Step 4: Simplify right side
    223.50x = 46,171.97
  5. Step 5: Solve for x
    x = 46,171.97/223.50
  6. Step 6: Final answer
    x = 206.59

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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.