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Finding the Fourth Proportional to 1,768.13, 2,439.92 and 982.13

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Solution

The fourth proportional to 1,768.13, 2,439.92 and 982.13 is: 1,355.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.13 : 2,439.92 = 982.13 : x
  2. Step 2: Convert to fraction form
    1,768.13/2,439.92 = 982.13/x
  3. Step 3: Cross multiply
    1,768.13x = 2,439.92 × 982.13
  4. Step 4: Simplify right side
    1,768.13x = 2,396,308.89
  5. Step 5: Solve for x
    x = 2,396,308.89/1,768.13
  6. Step 6: Final answer
    x = 1,355.28

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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.