Home / 1,988.42-2,743.89-1,202.90

Finding the Fourth Proportional to 1,988.42, 2,743.89 and 1,202.90

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Solution

The fourth proportional to 1,988.42, 2,743.89 and 1,202.90 is: 1,659.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.42 : 2,743.89 = 1,202.90 : x
  2. Step 2: Convert to fraction form
    1,988.42/2,743.89 = 1,202.90/x
  3. Step 3: Cross multiply
    1,988.42x = 2,743.89 × 1,202.90
  4. Step 4: Simplify right side
    1,988.42x = 3,300,625.28
  5. Step 5: Solve for x
    x = 3,300,625.28/1,988.42
  6. Step 6: Final answer
    x = 1,659.92

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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.