Home / 2,542.20-3,809.70-1,878.90

Finding the Fourth Proportional to 2,542.20, 3,809.70 and 1,878.90

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Solution

The fourth proportional to 2,542.20, 3,809.70 and 1,878.90 is: 2,815.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,542.20 : 3,809.70 = 1,878.90 : x
  2. Step 2: Convert to fraction form
    2,542.20/3,809.70 = 1,878.90/x
  3. Step 3: Cross multiply
    2,542.20x = 3,809.70 × 1,878.90
  4. Step 4: Simplify right side
    2,542.20x = 7,158,045.33
  5. Step 5: Solve for x
    x = 7,158,045.33/2,542.20
  6. Step 6: Final answer
    x = 2,815.69

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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.