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Finding the Fourth Proportional to 223.86, 308.97 and 157.46

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Solution

The fourth proportional to 223.86, 308.97 and 157.46 is: 217.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.86 : 308.97 = 157.46 : x
  2. Step 2: Convert to fraction form
    223.86/308.97 = 157.46/x
  3. Step 3: Cross multiply
    223.86x = 308.97 × 157.46
  4. Step 4: Simplify right side
    223.86x = 48,648.87
  5. Step 5: Solve for x
    x = 48,648.87/223.86
  6. Step 6: Final answer
    x = 217.32

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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.