Home / 2,540.87-3,506.46-1,421.78

Finding the Fourth Proportional to 2,540.87, 3,506.46 and 1,421.78

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Solution

The fourth proportional to 2,540.87, 3,506.46 and 1,421.78 is: 1,962.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,540.87 : 3,506.46 = 1,421.78 : x
  2. Step 2: Convert to fraction form
    2,540.87/3,506.46 = 1,421.78/x
  3. Step 3: Cross multiply
    2,540.87x = 3,506.46 × 1,421.78
  4. Step 4: Simplify right side
    2,540.87x = 4,985,414.70
  5. Step 5: Solve for x
    x = 4,985,414.70/2,540.87
  6. Step 6: Final answer
    x = 1,962.09

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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.