Home / 1,988.36-2,741.36-1,279

Finding the Fourth Proportional to 1,988.36, 2,741.36 and 1,279

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Solution

The fourth proportional to 1,988.36, 2,741.36 and 1,279 is: 1,763.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.36 : 2,741.36 = 1,279 : x
  2. Step 2: Convert to fraction form
    1,988.36/2,741.36 = 1,279/x
  3. Step 3: Cross multiply
    1,988.36x = 2,741.36 × 1,279
  4. Step 4: Simplify right side
    1,988.36x = 3,506,199.44
  5. Step 5: Solve for x
    x = 3,506,199.44/1,988.36
  6. Step 6: Final answer
    x = 1,763.36

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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.