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Finding the Fourth Proportional to 631.45, 871.31 and 382.73

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Solution

The fourth proportional to 631.45, 871.31 and 382.73 is: 528.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.45 : 871.31 = 382.73 : x
  2. Step 2: Convert to fraction form
    631.45/871.31 = 382.73/x
  3. Step 3: Cross multiply
    631.45x = 871.31 × 382.73
  4. Step 4: Simplify right side
    631.45x = 333,470.92
  5. Step 5: Solve for x
    x = 333,470.92/631.45
  6. Step 6: Final answer
    x = 528.11

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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.