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Finding the Fourth Proportional to 305.38, 458.15 and 99.95

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Solution

The fourth proportional to 305.38, 458.15 and 99.95 is: 149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.38 : 458.15 = 99.95 : x
  2. Step 2: Convert to fraction form
    305.38/458.15 = 99.95/x
  3. Step 3: Cross multiply
    305.38x = 458.15 × 99.95
  4. Step 4: Simplify right side
    305.38x = 45,789.30
  5. Step 5: Solve for x
    x = 45,789.30/305.38
  6. Step 6: Final answer
    x = 149.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.