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Finding the Fourth Proportional to 223.46, 308.40 and 130.21

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Solution

The fourth proportional to 223.46, 308.40 and 130.21 is: 179.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.46 : 308.40 = 130.21 : x
  2. Step 2: Convert to fraction form
    223.46/308.40 = 130.21/x
  3. Step 3: Cross multiply
    223.46x = 308.40 × 130.21
  4. Step 4: Simplify right side
    223.46x = 40,155.99
  5. Step 5: Solve for x
    x = 40,155.99/223.46
  6. Step 6: Final answer
    x = 179.71

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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.