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Finding the Fourth Proportional to 426.38, 588.30 and 286.25

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Solution

The fourth proportional to 426.38, 588.30 and 286.25 is: 394.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.38 : 588.30 = 286.25 : x
  2. Step 2: Convert to fraction form
    426.38/588.30 = 286.25/x
  3. Step 3: Cross multiply
    426.38x = 588.30 × 286.25
  4. Step 4: Simplify right side
    426.38x = 168,400.88
  5. Step 5: Solve for x
    x = 168,400.88/426.38
  6. Step 6: Final answer
    x = 394.95

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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.