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Finding the Fourth Proportional to 2,689.43, 4,029.39 and 1,868.22

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Solution

The fourth proportional to 2,689.43, 4,029.39 and 1,868.22 is: 2,799.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.43 : 4,029.39 = 1,868.22 : x
  2. Step 2: Convert to fraction form
    2,689.43/4,029.39 = 1,868.22/x
  3. Step 3: Cross multiply
    2,689.43x = 4,029.39 × 1,868.22
  4. Step 4: Simplify right side
    2,689.43x = 7,527,786.99
  5. Step 5: Solve for x
    x = 7,527,786.99/2,689.43
  6. Step 6: Final answer
    x = 2,799.03

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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.