Home / 1,768.11-2,439.90-982.20

Finding the Fourth Proportional to 1,768.11, 2,439.90 and 982.20

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Solution

The fourth proportional to 1,768.11, 2,439.90 and 982.20 is: 1,355.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.11 : 2,439.90 = 982.20 : x
  2. Step 2: Convert to fraction form
    1,768.11/2,439.90 = 982.20/x
  3. Step 3: Cross multiply
    1,768.11x = 2,439.90 × 982.20
  4. Step 4: Simplify right side
    1,768.11x = 2,396,478.93
  5. Step 5: Solve for x
    x = 2,396,478.93/1,768.11
  6. Step 6: Final answer
    x = 1,355.39

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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.