Home / 1,989.24-2,743.93-1,280.82

Finding the Fourth Proportional to 1,989.24, 2,743.93 and 1,280.82

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Solution

The fourth proportional to 1,989.24, 2,743.93 and 1,280.82 is: 1,766.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.24 : 2,743.93 = 1,280.82 : x
  2. Step 2: Convert to fraction form
    1,989.24/2,743.93 = 1,280.82/x
  3. Step 3: Cross multiply
    1,989.24x = 2,743.93 × 1,280.82
  4. Step 4: Simplify right side
    1,989.24x = 3,514,480.42
  5. Step 5: Solve for x
    x = 3,514,480.42/1,989.24
  6. Step 6: Final answer
    x = 1,766.75

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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.