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Finding the Fourth Proportional to 463.17, 639.18 and 253.35

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Solution

The fourth proportional to 463.17, 639.18 and 253.35 is: 349.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.17 : 639.18 = 253.35 : x
  2. Step 2: Convert to fraction form
    463.17/639.18 = 253.35/x
  3. Step 3: Cross multiply
    463.17x = 639.18 × 253.35
  4. Step 4: Simplify right side
    463.17x = 161,936.25
  5. Step 5: Solve for x
    x = 161,936.25/463.17
  6. Step 6: Final answer
    x = 349.63

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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.