Home / 2,921.58-4,377.80-1,689.57

Finding the Fourth Proportional to 2,921.58, 4,377.80 and 1,689.57

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Solution

The fourth proportional to 2,921.58, 4,377.80 and 1,689.57 is: 2,531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.58 : 4,377.80 = 1,689.57 : x
  2. Step 2: Convert to fraction form
    2,921.58/4,377.80 = 1,689.57/x
  3. Step 3: Cross multiply
    2,921.58x = 4,377.80 × 1,689.57
  4. Step 4: Simplify right side
    2,921.58x = 7,396,591.10
  5. Step 5: Solve for x
    x = 7,396,591.10/2,921.58
  6. Step 6: Final answer
    x = 2,531.71

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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.