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Finding the Fourth Proportional to 305.32, 458 and 112.96

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Solution

The fourth proportional to 305.32, 458 and 112.96 is: 169.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.32 : 458 = 112.96 : x
  2. Step 2: Convert to fraction form
    305.32/458 = 112.96/x
  3. Step 3: Cross multiply
    305.32x = 458 × 112.96
  4. Step 4: Simplify right side
    305.32x = 51,735.68
  5. Step 5: Solve for x
    x = 51,735.68/305.32
  6. Step 6: Final answer
    x = 169.45

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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.