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Finding the Fourth Proportional to 223.43, 308.15 and 149.63

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Solution

The fourth proportional to 223.43, 308.15 and 149.63 is: 206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.43 : 308.15 = 149.63 : x
  2. Step 2: Convert to fraction form
    223.43/308.15 = 149.63/x
  3. Step 3: Cross multiply
    223.43x = 308.15 × 149.63
  4. Step 4: Simplify right side
    223.43x = 46,106.20
  5. Step 5: Solve for x
    x = 46,106.20/223.43
  6. Step 6: Final answer
    x = 206.36

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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.