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Finding the Fourth Proportional to 305.29, 458.02 and 99.86

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Solution

The fourth proportional to 305.29, 458.02 and 99.86 is: 149.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.29 : 458.02 = 99.86 : x
  2. Step 2: Convert to fraction form
    305.29/458.02 = 99.86/x
  3. Step 3: Cross multiply
    305.29x = 458.02 × 99.86
  4. Step 4: Simplify right side
    305.29x = 45,735.84
  5. Step 5: Solve for x
    x = 45,735.84/305.29
  6. Step 6: Final answer
    x = 149.81

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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.