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Finding the Fourth Proportional to 463.32, 639.17 and 305.73

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Solution

The fourth proportional to 463.32, 639.17 and 305.73 is: 421.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.32 : 639.17 = 305.73 : x
  2. Step 2: Convert to fraction form
    463.32/639.17 = 305.73/x
  3. Step 3: Cross multiply
    463.32x = 639.17 × 305.73
  4. Step 4: Simplify right side
    463.32x = 195,413.44
  5. Step 5: Solve for x
    x = 195,413.44/463.32
  6. Step 6: Final answer
    x = 421.77

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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.