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Finding the Fourth Proportional to 305.28, 458.31 and 254.55

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Solution

The fourth proportional to 305.28, 458.31 and 254.55 is: 382.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.28 : 458.31 = 254.55 : x
  2. Step 2: Convert to fraction form
    305.28/458.31 = 254.55/x
  3. Step 3: Cross multiply
    305.28x = 458.31 × 254.55
  4. Step 4: Simplify right side
    305.28x = 116,662.81
  5. Step 5: Solve for x
    x = 116,662.81/305.28
  6. Step 6: Final answer
    x = 382.15

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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.