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Finding the Fourth Proportional to 463.22, 639.04 and 305.66

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Solution

The fourth proportional to 463.22, 639.04 and 305.66 is: 421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.22 : 639.04 = 305.66 : x
  2. Step 2: Convert to fraction form
    463.22/639.04 = 305.66/x
  3. Step 3: Cross multiply
    463.22x = 639.04 × 305.66
  4. Step 4: Simplify right side
    463.22x = 195,328.97
  5. Step 5: Solve for x
    x = 195,328.97/463.22
  6. Step 6: Final answer
    x = 421.68

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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.