Home / 1,987.19-2,743.57-1,280.27

Finding the Fourth Proportional to 1,987.19, 2,743.57 and 1,280.27

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Solution

The fourth proportional to 1,987.19, 2,743.57 and 1,280.27 is: 1,767.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.19 : 2,743.57 = 1,280.27 : x
  2. Step 2: Convert to fraction form
    1,987.19/2,743.57 = 1,280.27/x
  3. Step 3: Cross multiply
    1,987.19x = 2,743.57 × 1,280.27
  4. Step 4: Simplify right side
    1,987.19x = 3,512,510.36
  5. Step 5: Solve for x
    x = 3,512,510.36/1,987.19
  6. Step 6: Final answer
    x = 1,767.58

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Double scale
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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.