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Finding the Fourth Proportional to 426.32, 638.52 and 233.68

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Solution

The fourth proportional to 426.32, 638.52 and 233.68 is: 349.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.32 : 638.52 = 233.68 : x
  2. Step 2: Convert to fraction form
    426.32/638.52 = 233.68/x
  3. Step 3: Cross multiply
    426.32x = 638.52 × 233.68
  4. Step 4: Simplify right side
    426.32x = 149,209.35
  5. Step 5: Solve for x
    x = 149,209.35/426.32
  6. Step 6: Final answer
    x = 349.99

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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.