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Finding the Fourth Proportional to 401.71, 554.34 and 254.47

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Solution

The fourth proportional to 401.71, 554.34 and 254.47 is: 351.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.71 : 554.34 = 254.47 : x
  2. Step 2: Convert to fraction form
    401.71/554.34 = 254.47/x
  3. Step 3: Cross multiply
    401.71x = 554.34 × 254.47
  4. Step 4: Simplify right side
    401.71x = 141,062.90
  5. Step 5: Solve for x
    x = 141,062.90/401.71
  6. Step 6: Final answer
    x = 351.16

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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.