Home / 2,161.32-2,982.82-1,689.64

Finding the Fourth Proportional to 2,161.32, 2,982.82 and 1,689.64

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Solution

The fourth proportional to 2,161.32, 2,982.82 and 1,689.64 is: 2,331.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.32 : 2,982.82 = 1,689.64 : x
  2. Step 2: Convert to fraction form
    2,161.32/2,982.82 = 1,689.64/x
  3. Step 3: Cross multiply
    2,161.32x = 2,982.82 × 1,689.64
  4. Step 4: Simplify right side
    2,161.32x = 5,039,891.98
  5. Step 5: Solve for x
    x = 5,039,891.98/2,161.32
  6. Step 6: Final answer
    x = 2,331.86

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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.