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Finding the Fourth Proportional to 1,340.62, 1,850.85 and 843.68

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Solution

The fourth proportional to 1,340.62, 1,850.85 and 843.68 is: 1,164.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.62 : 1,850.85 = 843.68 : x
  2. Step 2: Convert to fraction form
    1,340.62/1,850.85 = 843.68/x
  3. Step 3: Cross multiply
    1,340.62x = 1,850.85 × 843.68
  4. Step 4: Simplify right side
    1,340.62x = 1,561,529.76
  5. Step 5: Solve for x
    x = 1,561,529.76/1,340.62
  6. Step 6: Final answer
    x = 1,164.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.