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Finding the Fourth Proportional to 426.70, 588.90 and 240.20

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Solution

The fourth proportional to 426.70, 588.90 and 240.20 is: 331.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.70 : 588.90 = 240.20 : x
  2. Step 2: Convert to fraction form
    426.70/588.90 = 240.20/x
  3. Step 3: Cross multiply
    426.70x = 588.90 × 240.20
  4. Step 4: Simplify right side
    426.70x = 141,453.78
  5. Step 5: Solve for x
    x = 141,453.78/426.70
  6. Step 6: Final answer
    x = 331.51

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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.