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Finding the Fourth Proportional to 402.56, 555.52 and 254.96

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Solution

The fourth proportional to 402.56, 555.52 and 254.96 is: 351.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.56 : 555.52 = 254.96 : x
  2. Step 2: Convert to fraction form
    402.56/555.52 = 254.96/x
  3. Step 3: Cross multiply
    402.56x = 555.52 × 254.96
  4. Step 4: Simplify right side
    402.56x = 141,635.38
  5. Step 5: Solve for x
    x = 141,635.38/402.56
  6. Step 6: Final answer
    x = 351.84

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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.