Home / 2,187.30-3,280.95-726.45

Finding the Fourth Proportional to 2,187.30, 3,280.95 and 726.45

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Solution

The fourth proportional to 2,187.30, 3,280.95 and 726.45 is: 1,089.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.30 : 3,280.95 = 726.45 : x
  2. Step 2: Convert to fraction form
    2,187.30/3,280.95 = 726.45/x
  3. Step 3: Cross multiply
    2,187.30x = 3,280.95 × 726.45
  4. Step 4: Simplify right side
    2,187.30x = 2,383,446.13
  5. Step 5: Solve for x
    x = 2,383,446.13/2,187.30
  6. Step 6: Final answer
    x = 1,089.68

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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.