Home / 2,187.28-3,281.12-726.45

Finding the Fourth Proportional to 2,187.28, 3,281.12 and 726.45

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Solution

The fourth proportional to 2,187.28, 3,281.12 and 726.45 is: 1,089.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.28 : 3,281.12 = 726.45 : x
  2. Step 2: Convert to fraction form
    2,187.28/3,281.12 = 726.45/x
  3. Step 3: Cross multiply
    2,187.28x = 3,281.12 × 726.45
  4. Step 4: Simplify right side
    2,187.28x = 2,383,569.62
  5. Step 5: Solve for x
    x = 2,383,569.62/2,187.28
  6. Step 6: Final answer
    x = 1,089.74

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1.5x scale

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.