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Finding the Fourth Proportional to 463.71, 639.53 and 306.35

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Solution

The fourth proportional to 463.71, 639.53 and 306.35 is: 422.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.71 : 639.53 = 306.35 : x
  2. Step 2: Convert to fraction form
    463.71/639.53 = 306.35/x
  3. Step 3: Cross multiply
    463.71x = 639.53 × 306.35
  4. Step 4: Simplify right side
    463.71x = 195,919.54
  5. Step 5: Solve for x
    x = 195,919.54/463.71
  6. Step 6: Final answer
    x = 422.50

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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.