Home / 1,928.68-2,661.36-1,089.20

Finding the Fourth Proportional to 1,928.68, 2,661.36 and 1,089.20

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Solution

The fourth proportional to 1,928.68, 2,661.36 and 1,089.20 is: 1,502.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.68 : 2,661.36 = 1,089.20 : x
  2. Step 2: Convert to fraction form
    1,928.68/2,661.36 = 1,089.20/x
  3. Step 3: Cross multiply
    1,928.68x = 2,661.36 × 1,089.20
  4. Step 4: Simplify right side
    1,928.68x = 2,898,753.31
  5. Step 5: Solve for x
    x = 2,898,753.31/1,928.68
  6. Step 6: Final answer
    x = 1,502.97

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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.