Home / 2,808.20-3,873.52-1,689.49

Finding the Fourth Proportional to 2,808.20, 3,873.52 and 1,689.49

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Solution

The fourth proportional to 2,808.20, 3,873.52 and 1,689.49 is: 2,330.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.20 : 3,873.52 = 1,689.49 : x
  2. Step 2: Convert to fraction form
    2,808.20/3,873.52 = 1,689.49/x
  3. Step 3: Cross multiply
    2,808.20x = 3,873.52 × 1,689.49
  4. Step 4: Simplify right side
    2,808.20x = 6,544,280.26
  5. Step 5: Solve for x
    x = 6,544,280.26/2,808.20
  6. Step 6: Final answer
    x = 2,330.42

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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.