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Finding the Fourth Proportional to 463.62, 639.26 and 380.46

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Solution

The fourth proportional to 463.62, 639.26 and 380.46 is: 524.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.62 : 639.26 = 380.46 : x
  2. Step 2: Convert to fraction form
    463.62/639.26 = 380.46/x
  3. Step 3: Cross multiply
    463.62x = 639.26 × 380.46
  4. Step 4: Simplify right side
    463.62x = 243,214.78
  5. Step 5: Solve for x
    x = 243,214.78/463.62
  6. Step 6: Final answer
    x = 524.60

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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.