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Finding the Fourth Proportional to 2,079.99, 3,121.26 and 969.21

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Solution

The fourth proportional to 2,079.99, 3,121.26 and 969.21 is: 1,454.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.99 : 3,121.26 = 969.21 : x
  2. Step 2: Convert to fraction form
    2,079.99/3,121.26 = 969.21/x
  3. Step 3: Cross multiply
    2,079.99x = 3,121.26 × 969.21
  4. Step 4: Simplify right side
    2,079.99x = 3,025,156.40
  5. Step 5: Solve for x
    x = 3,025,156.40/2,079.99
  6. Step 6: Final answer
    x = 1,454.41

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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.