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Finding the Fourth Proportional to 463.56, 639.60 and 256.56

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Solution

The fourth proportional to 463.56, 639.60 and 256.56 is: 353.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.56 : 639.60 = 256.56 : x
  2. Step 2: Convert to fraction form
    463.56/639.60 = 256.56/x
  3. Step 3: Cross multiply
    463.56x = 639.60 × 256.56
  4. Step 4: Simplify right side
    463.56x = 164,095.78
  5. Step 5: Solve for x
    x = 164,095.78/463.56
  6. Step 6: Final answer
    x = 353.99

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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.