Home / 1,982.36-2,976.68-1,911.63

Finding the Fourth Proportional to 1,982.36, 2,976.68 and 1,911.63

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Solution

The fourth proportional to 1,982.36, 2,976.68 and 1,911.63 is: 2,870.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.36 : 2,976.68 = 1,911.63 : x
  2. Step 2: Convert to fraction form
    1,982.36/2,976.68 = 1,911.63/x
  3. Step 3: Cross multiply
    1,982.36x = 2,976.68 × 1,911.63
  4. Step 4: Simplify right side
    1,982.36x = 5,690,315.57
  5. Step 5: Solve for x
    x = 5,690,315.57/1,982.36
  6. Step 6: Final answer
    x = 2,870.47

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1.5x scale

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.