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Finding the Fourth Proportional to 2,626.80, 3,938.85 and 982.86

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Solution

The fourth proportional to 2,626.80, 3,938.85 and 982.86 is: 1,473.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,626.80 : 3,938.85 = 982.86 : x
  2. Step 2: Convert to fraction form
    2,626.80/3,938.85 = 982.86/x
  3. Step 3: Cross multiply
    2,626.80x = 3,938.85 × 982.86
  4. Step 4: Simplify right side
    2,626.80x = 3,871,338.11
  5. Step 5: Solve for x
    x = 3,871,338.11/2,626.80
  6. Step 6: Final answer
    x = 1,473.78

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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.