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Finding the Fourth Proportional to 463.55, 639.41 and 276.89

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Solution

The fourth proportional to 463.55, 639.41 and 276.89 is: 381.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.55 : 639.41 = 276.89 : x
  2. Step 2: Convert to fraction form
    463.55/639.41 = 276.89/x
  3. Step 3: Cross multiply
    463.55x = 639.41 × 276.89
  4. Step 4: Simplify right side
    463.55x = 177,041.65
  5. Step 5: Solve for x
    x = 177,041.65/463.55
  6. Step 6: Final answer
    x = 381.93

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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.