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Finding the Fourth Proportional to 402.06, 554.63 and 254.44

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Solution

The fourth proportional to 402.06, 554.63 and 254.44 is: 350.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.06 : 554.63 = 254.44 : x
  2. Step 2: Convert to fraction form
    402.06/554.63 = 254.44/x
  3. Step 3: Cross multiply
    402.06x = 554.63 × 254.44
  4. Step 4: Simplify right side
    402.06x = 141,117.28
  5. Step 5: Solve for x
    x = 141,117.28/402.06
  6. Step 6: Final answer
    x = 350.99

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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.