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Finding the Fourth Proportional to 631.24, 870.87 and 382.64

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Solution

The fourth proportional to 631.24, 870.87 and 382.64 is: 527.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.24 : 870.87 = 382.64 : x
  2. Step 2: Convert to fraction form
    631.24/870.87 = 382.64/x
  3. Step 3: Cross multiply
    631.24x = 870.87 × 382.64
  4. Step 4: Simplify right side
    631.24x = 333,229.41
  5. Step 5: Solve for x
    x = 333,229.41/631.24
  6. Step 6: Final answer
    x = 527.90

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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.