Home / 1,988.15-2,744.91-1,280.26

Finding the Fourth Proportional to 1,988.15, 2,744.91 and 1,280.26

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Solution

The fourth proportional to 1,988.15, 2,744.91 and 1,280.26 is: 1,767.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.15 : 2,744.91 = 1,280.26 : x
  2. Step 2: Convert to fraction form
    1,988.15/2,744.91 = 1,280.26/x
  3. Step 3: Cross multiply
    1,988.15x = 2,744.91 × 1,280.26
  4. Step 4: Simplify right side
    1,988.15x = 3,514,198.48
  5. Step 5: Solve for x
    x = 3,514,198.48/1,988.15
  6. Step 6: Final answer
    x = 1,767.57

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1.5x scale

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.