Home / 1,871.28-2,579.94-1,280.79

Finding the Fourth Proportional to 1,871.28, 2,579.94 and 1,280.79

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Solution

The fourth proportional to 1,871.28, 2,579.94 and 1,280.79 is: 1,765.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.28 : 2,579.94 = 1,280.79 : x
  2. Step 2: Convert to fraction form
    1,871.28/2,579.94 = 1,280.79/x
  3. Step 3: Cross multiply
    1,871.28x = 2,579.94 × 1,280.79
  4. Step 4: Simplify right side
    1,871.28x = 3,304,361.35
  5. Step 5: Solve for x
    x = 3,304,361.35/1,871.28
  6. Step 6: Final answer
    x = 1,765.83

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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.