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Finding the Fourth Proportional to 426.12, 588 and 286.21

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Solution

The fourth proportional to 426.12, 588 and 286.21 is: 394.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.12 : 588 = 286.21 : x
  2. Step 2: Convert to fraction form
    426.12/588 = 286.21/x
  3. Step 3: Cross multiply
    426.12x = 588 × 286.21
  4. Step 4: Simplify right side
    426.12x = 168,291.48
  5. Step 5: Solve for x
    x = 168,291.48/426.12
  6. Step 6: Final answer
    x = 394.94

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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.