Home / 1,787.29-2,679.45-1,240.54

Finding the Fourth Proportional to 1,787.29, 2,679.45 and 1,240.54

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Solution

The fourth proportional to 1,787.29, 2,679.45 and 1,240.54 is: 1,859.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.29 : 2,679.45 = 1,240.54 : x
  2. Step 2: Convert to fraction form
    1,787.29/2,679.45 = 1,240.54/x
  3. Step 3: Cross multiply
    1,787.29x = 2,679.45 × 1,240.54
  4. Step 4: Simplify right side
    1,787.29x = 3,323,964.90
  5. Step 5: Solve for x
    x = 3,323,964.90/1,787.29
  6. Step 6: Final answer
    x = 1,859.78

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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.