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Finding the Fourth Proportional to 1,869.92, 2,805.84 and 1,361.12

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Solution

The fourth proportional to 1,869.92, 2,805.84 and 1,361.12 is: 2,042.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.92 : 2,805.84 = 1,361.12 : x
  2. Step 2: Convert to fraction form
    1,869.92/2,805.84 = 1,361.12/x
  3. Step 3: Cross multiply
    1,869.92x = 2,805.84 × 1,361.12
  4. Step 4: Simplify right side
    1,869.92x = 3,819,084.94
  5. Step 5: Solve for x
    x = 3,819,084.94/1,869.92
  6. Step 6: Final answer
    x = 2,042.38

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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.