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Finding the Fourth Proportional to 426.29, 588.20 and 286.63

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Solution

The fourth proportional to 426.29, 588.20 and 286.63 is: 395.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.29 : 588.20 = 286.63 : x
  2. Step 2: Convert to fraction form
    426.29/588.20 = 286.63/x
  3. Step 3: Cross multiply
    426.29x = 588.20 × 286.63
  4. Step 4: Simplify right side
    426.29x = 168,592.86
  5. Step 5: Solve for x
    x = 168,592.86/426.29
  6. Step 6: Final answer
    x = 395.49

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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.