Home / 1,988.39-2,982.54-1,171.85

Finding the Fourth Proportional to 1,988.39, 2,982.54 and 1,171.85

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Solution

The fourth proportional to 1,988.39, 2,982.54 and 1,171.85 is: 1,757.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.39 : 2,982.54 = 1,171.85 : x
  2. Step 2: Convert to fraction form
    1,988.39/2,982.54 = 1,171.85/x
  3. Step 3: Cross multiply
    1,988.39x = 2,982.54 × 1,171.85
  4. Step 4: Simplify right side
    1,988.39x = 3,495,074.59
  5. Step 5: Solve for x
    x = 3,495,074.59/1,988.39
  6. Step 6: Final answer
    x = 1,757.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.