Home / 3,822.78-5,278.18-2,641.80

Finding the Fourth Proportional to 3,822.78, 5,278.18 and 2,641.80

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Solution

The fourth proportional to 3,822.78, 5,278.18 and 2,641.80 is: 3,647.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,822.78 : 5,278.18 = 2,641.80 : x
  2. Step 2: Convert to fraction form
    3,822.78/5,278.18 = 2,641.80/x
  3. Step 3: Cross multiply
    3,822.78x = 5,278.18 × 2,641.80
  4. Step 4: Simplify right side
    3,822.78x = 13,943,895.92
  5. Step 5: Solve for x
    x = 13,943,895.92/3,822.78
  6. Step 6: Final answer
    x = 3,647.58

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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.