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Finding the Fourth Proportional to 463.16, 639.02 and 279.16

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Solution

The fourth proportional to 463.16, 639.02 and 279.16 is: 385.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.16 : 639.02 = 279.16 : x
  2. Step 2: Convert to fraction form
    463.16/639.02 = 279.16/x
  3. Step 3: Cross multiply
    463.16x = 639.02 × 279.16
  4. Step 4: Simplify right side
    463.16x = 178,388.82
  5. Step 5: Solve for x
    x = 178,388.82/463.16
  6. Step 6: Final answer
    x = 385.16

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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.