Home / 1,988.40-2,744.26-1,202.70

Finding the Fourth Proportional to 1,988.40, 2,744.26 and 1,202.70

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Solution

The fourth proportional to 1,988.40, 2,744.26 and 1,202.70 is: 1,659.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.40 : 2,744.26 = 1,202.70 : x
  2. Step 2: Convert to fraction form
    1,988.40/2,744.26 = 1,202.70/x
  3. Step 3: Cross multiply
    1,988.40x = 2,744.26 × 1,202.70
  4. Step 4: Simplify right side
    1,988.40x = 3,300,521.50
  5. Step 5: Solve for x
    x = 3,300,521.50/1,988.40
  6. Step 6: Final answer
    x = 1,659.89

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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.