Home / 1,987.89-2,743.32-1,202.19

Finding the Fourth Proportional to 1,987.89, 2,743.32 and 1,202.19

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Solution

The fourth proportional to 1,987.89, 2,743.32 and 1,202.19 is: 1,659.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.89 : 2,743.32 = 1,202.19 : x
  2. Step 2: Convert to fraction form
    1,987.89/2,743.32 = 1,202.19/x
  3. Step 3: Cross multiply
    1,987.89x = 2,743.32 × 1,202.19
  4. Step 4: Simplify right side
    1,987.89x = 3,297,991.87
  5. Step 5: Solve for x
    x = 3,297,991.87/1,987.89
  6. Step 6: Final answer
    x = 1,659.04

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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.