Home / 2,982.62-4,117.91-1,920.78

Finding the Fourth Proportional to 2,982.62, 4,117.91 and 1,920.78

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Solution

The fourth proportional to 2,982.62, 4,117.91 and 1,920.78 is: 2,651.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,982.62 : 4,117.91 = 1,920.78 : x
  2. Step 2: Convert to fraction form
    2,982.62/4,117.91 = 1,920.78/x
  3. Step 3: Cross multiply
    2,982.62x = 4,117.91 × 1,920.78
  4. Step 4: Simplify right side
    2,982.62x = 7,909,589.57
  5. Step 5: Solve for x
    x = 7,909,589.57/2,982.62
  6. Step 6: Final answer
    x = 2,651.89

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1.5x scale

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.