Home / 1,988.28-2,743.32-1,242.60

Finding the Fourth Proportional to 1,988.28, 2,743.32 and 1,242.60

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Solution

The fourth proportional to 1,988.28, 2,743.32 and 1,242.60 is: 1,714.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.28 : 2,743.32 = 1,242.60 : x
  2. Step 2: Convert to fraction form
    1,988.28/2,743.32 = 1,242.60/x
  3. Step 3: Cross multiply
    1,988.28x = 2,743.32 × 1,242.60
  4. Step 4: Simplify right side
    1,988.28x = 3,408,849.43
  5. Step 5: Solve for x
    x = 3,408,849.43/1,988.28
  6. Step 6: Final answer
    x = 1,714.47

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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.