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Finding the Fourth Proportional to 463.57, 639.56 and 306.50

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Solution

The fourth proportional to 463.57, 639.56 and 306.50 is: 422.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.57 : 639.56 = 306.50 : x
  2. Step 2: Convert to fraction form
    463.57/639.56 = 306.50/x
  3. Step 3: Cross multiply
    463.57x = 639.56 × 306.50
  4. Step 4: Simplify right side
    463.57x = 196,022.71
  5. Step 5: Solve for x
    x = 196,022.71/463.57
  6. Step 6: Final answer
    x = 422.86

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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.