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Finding the Fourth Proportional to 463.26, 639.34 and 256.26

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Solution

The fourth proportional to 463.26, 639.34 and 256.26 is: 353.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.26 : 639.34 = 256.26 : x
  2. Step 2: Convert to fraction form
    463.26/639.34 = 256.26/x
  3. Step 3: Cross multiply
    463.26x = 639.34 × 256.26
  4. Step 4: Simplify right side
    463.26x = 163,837.27
  5. Step 5: Solve for x
    x = 163,837.27/463.26
  6. Step 6: Final answer
    x = 353.66

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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.