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Finding the Fourth Proportional to 426.78, 588.56 and 394.97

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Solution

The fourth proportional to 426.78, 588.56 and 394.97 is: 544.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.78 : 588.56 = 394.97 : x
  2. Step 2: Convert to fraction form
    426.78/588.56 = 394.97/x
  3. Step 3: Cross multiply
    426.78x = 588.56 × 394.97
  4. Step 4: Simplify right side
    426.78x = 232,460.11
  5. Step 5: Solve for x
    x = 232,460.11/426.78
  6. Step 6: Final answer
    x = 544.68

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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.