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Finding the Fourth Proportional to 426.83, 588.72 and 391.97

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Solution

The fourth proportional to 426.83, 588.72 and 391.97 is: 540.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.83 : 588.72 = 391.97 : x
  2. Step 2: Convert to fraction form
    426.83/588.72 = 391.97/x
  3. Step 3: Cross multiply
    426.83x = 588.72 × 391.97
  4. Step 4: Simplify right side
    426.83x = 230,760.58
  5. Step 5: Solve for x
    x = 230,760.58/426.83
  6. Step 6: Final answer
    x = 540.64

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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.