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Finding the Fourth Proportional to 353.80, 488.34 and 229.45

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Solution

The fourth proportional to 353.80, 488.34 and 229.45 is: 316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.80 : 488.34 = 229.45 : x
  2. Step 2: Convert to fraction form
    353.80/488.34 = 229.45/x
  3. Step 3: Cross multiply
    353.80x = 488.34 × 229.45
  4. Step 4: Simplify right side
    353.80x = 112,049.61
  5. Step 5: Solve for x
    x = 112,049.61/353.80
  6. Step 6: Final answer
    x = 316.70

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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.