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Finding the Fourth Proportional to 463.84, 639.93 and 306.55

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Solution

The fourth proportional to 463.84, 639.93 and 306.55 is: 422.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.84 : 639.93 = 306.55 : x
  2. Step 2: Convert to fraction form
    463.84/639.93 = 306.55/x
  3. Step 3: Cross multiply
    463.84x = 639.93 × 306.55
  4. Step 4: Simplify right side
    463.84x = 196,170.54
  5. Step 5: Solve for x
    x = 196,170.54/463.84
  6. Step 6: Final answer
    x = 422.93

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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.