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Finding the Fourth Proportional to 2,340.35, 3,507.82 and 878.57

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Solution

The fourth proportional to 2,340.35, 3,507.82 and 878.57 is: 1,316.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,340.35 : 3,507.82 = 878.57 : x
  2. Step 2: Convert to fraction form
    2,340.35/3,507.82 = 878.57/x
  3. Step 3: Cross multiply
    2,340.35x = 3,507.82 × 878.57
  4. Step 4: Simplify right side
    2,340.35x = 3,081,845.68
  5. Step 5: Solve for x
    x = 3,081,845.68/2,340.35
  6. Step 6: Final answer
    x = 1,316.83

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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.