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Finding the Fourth Proportional to 2,687.92, 3,709.98 and 1,902.22

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Solution

The fourth proportional to 2,687.92, 3,709.98 and 1,902.22 is: 2,625.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.92 : 3,709.98 = 1,902.22 : x
  2. Step 2: Convert to fraction form
    2,687.92/3,709.98 = 1,902.22/x
  3. Step 3: Cross multiply
    2,687.92x = 3,709.98 × 1,902.22
  4. Step 4: Simplify right side
    2,687.92x = 7,057,198.16
  5. Step 5: Solve for x
    x = 7,057,198.16/2,687.92
  6. Step 6: Final answer
    x = 2,625.52

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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.