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Finding the Fourth Proportional to 402.13, 554.85 and 254.95

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Solution

The fourth proportional to 402.13, 554.85 and 254.95 is: 351.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.13 : 554.85 = 254.95 : x
  2. Step 2: Convert to fraction form
    402.13/554.85 = 254.95/x
  3. Step 3: Cross multiply
    402.13x = 554.85 × 254.95
  4. Step 4: Simplify right side
    402.13x = 141,459.01
  5. Step 5: Solve for x
    x = 141,459.01/402.13
  6. Step 6: Final answer
    x = 351.77

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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.