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Finding the Fourth Proportional to 800.35, 1,199.61 and 338.05

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Solution

The fourth proportional to 800.35, 1,199.61 and 338.05 is: 506.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.35 : 1,199.61 = 338.05 : x
  2. Step 2: Convert to fraction form
    800.35/1,199.61 = 338.05/x
  3. Step 3: Cross multiply
    800.35x = 1,199.61 × 338.05
  4. Step 4: Simplify right side
    800.35x = 405,528.16
  5. Step 5: Solve for x
    x = 405,528.16/800.35
  6. Step 6: Final answer
    x = 506.69

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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.