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Finding the Fourth Proportional to 426.01, 639.20 and 233.41

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Solution

The fourth proportional to 426.01, 639.20 and 233.41 is: 350.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.01 : 639.20 = 233.41 : x
  2. Step 2: Convert to fraction form
    426.01/639.20 = 233.41/x
  3. Step 3: Cross multiply
    426.01x = 639.20 × 233.41
  4. Step 4: Simplify right side
    426.01x = 149,195.67
  5. Step 5: Solve for x
    x = 149,195.67/426.01
  6. Step 6: Final answer
    x = 350.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.