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Finding the Fourth Proportional to 401.60, 554.19 and 254.31

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Solution

The fourth proportional to 401.60, 554.19 and 254.31 is: 350.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.60 : 554.19 = 254.31 : x
  2. Step 2: Convert to fraction form
    401.60/554.19 = 254.31/x
  3. Step 3: Cross multiply
    401.60x = 554.19 × 254.31
  4. Step 4: Simplify right side
    401.60x = 140,936.06
  5. Step 5: Solve for x
    x = 140,936.06/401.60
  6. Step 6: Final answer
    x = 350.94

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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.