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Finding the Fourth Proportional to 631.74, 871.56 and 382.89

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Solution

The fourth proportional to 631.74, 871.56 and 382.89 is: 528.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.74 : 871.56 = 382.89 : x
  2. Step 2: Convert to fraction form
    631.74/871.56 = 382.89/x
  3. Step 3: Cross multiply
    631.74x = 871.56 × 382.89
  4. Step 4: Simplify right side
    631.74x = 333,711.61
  5. Step 5: Solve for x
    x = 333,711.61/631.74
  6. Step 6: Final answer
    x = 528.24

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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.