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Finding the Fourth Proportional to 800.38, 1,200.78 and 337.96

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Solution

The fourth proportional to 800.38, 1,200.78 and 337.96 is: 507.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.38 : 1,200.78 = 337.96 : x
  2. Step 2: Convert to fraction form
    800.38/1,200.78 = 337.96/x
  3. Step 3: Cross multiply
    800.38x = 1,200.78 × 337.96
  4. Step 4: Simplify right side
    800.38x = 405,815.61
  5. Step 5: Solve for x
    x = 405,815.61/800.38
  6. Step 6: Final answer
    x = 507.03

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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.