Home / 1,928.28-2,660.79-1,089.09

Finding the Fourth Proportional to 1,928.28, 2,660.79 and 1,089.09

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Solution

The fourth proportional to 1,928.28, 2,660.79 and 1,089.09 is: 1,502.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.28 : 2,660.79 = 1,089.09 : x
  2. Step 2: Convert to fraction form
    1,928.28/2,660.79 = 1,089.09/x
  3. Step 3: Cross multiply
    1,928.28x = 2,660.79 × 1,089.09
  4. Step 4: Simplify right side
    1,928.28x = 2,897,839.78
  5. Step 5: Solve for x
    x = 2,897,839.78/1,928.28
  6. Step 6: Final answer
    x = 1,502.81

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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.