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Finding the Fourth Proportional to 463.31, 639.37 and 276.99

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Solution

The fourth proportional to 463.31, 639.37 and 276.99 is: 382.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.31 : 639.37 = 276.99 : x
  2. Step 2: Convert to fraction form
    463.31/639.37 = 276.99/x
  3. Step 3: Cross multiply
    463.31x = 639.37 × 276.99
  4. Step 4: Simplify right side
    463.31x = 177,099.10
  5. Step 5: Solve for x
    x = 177,099.10/463.31
  6. Step 6: Final answer
    x = 382.25

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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.