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Finding the Fourth Proportional to 426.86, 640.68 and 244.42

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Solution

The fourth proportional to 426.86, 640.68 and 244.42 is: 366.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.86 : 640.68 = 244.42 : x
  2. Step 2: Convert to fraction form
    426.86/640.68 = 244.42/x
  3. Step 3: Cross multiply
    426.86x = 640.68 × 244.42
  4. Step 4: Simplify right side
    426.86x = 156,595.01
  5. Step 5: Solve for x
    x = 156,595.01/426.86
  6. Step 6: Final answer
    x = 366.85

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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.