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Finding the Fourth Proportional to 2,121.75, 3,182.07 and 951.09

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Solution

The fourth proportional to 2,121.75, 3,182.07 and 951.09 is: 1,426.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.75 : 3,182.07 = 951.09 : x
  2. Step 2: Convert to fraction form
    2,121.75/3,182.07 = 951.09/x
  3. Step 3: Cross multiply
    2,121.75x = 3,182.07 × 951.09
  4. Step 4: Simplify right side
    2,121.75x = 3,026,434.96
  5. Step 5: Solve for x
    x = 3,026,434.96/2,121.75
  6. Step 6: Final answer
    x = 1,426.39

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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.