Home / 1,979.06-2,730.87-1,280.43

Finding the Fourth Proportional to 1,979.06, 2,730.87 and 1,280.43

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Solution

The fourth proportional to 1,979.06, 2,730.87 and 1,280.43 is: 1,766.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.06 : 2,730.87 = 1,280.43 : x
  2. Step 2: Convert to fraction form
    1,979.06/2,730.87 = 1,280.43/x
  3. Step 3: Cross multiply
    1,979.06x = 2,730.87 × 1,280.43
  4. Step 4: Simplify right side
    1,979.06x = 3,496,687.87
  5. Step 5: Solve for x
    x = 3,496,687.87/1,979.06
  6. Step 6: Final answer
    x = 1,766.85

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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.