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Finding the Fourth Proportional to 426.55, 639.69 and 244.03

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Solution

The fourth proportional to 426.55, 639.69 and 244.03 is: 365.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.55 : 639.69 = 244.03 : x
  2. Step 2: Convert to fraction form
    426.55/639.69 = 244.03/x
  3. Step 3: Cross multiply
    426.55x = 639.69 × 244.03
  4. Step 4: Simplify right side
    426.55x = 156,103.55
  5. Step 5: Solve for x
    x = 156,103.55/426.55
  6. Step 6: Final answer
    x = 365.97

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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.