Home / 3,805.20-5,243.40-2,808.90

Finding the Fourth Proportional to 3,805.20, 5,243.40 and 2,808.90

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Solution

The fourth proportional to 3,805.20, 5,243.40 and 2,808.90 is: 3,870.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,805.20 : 5,243.40 = 2,808.90 : x
  2. Step 2: Convert to fraction form
    3,805.20/5,243.40 = 2,808.90/x
  3. Step 3: Cross multiply
    3,805.20x = 5,243.40 × 2,808.90
  4. Step 4: Simplify right side
    3,805.20x = 14,728,186.26
  5. Step 5: Solve for x
    x = 14,728,186.26/3,805.20
  6. Step 6: Final answer
    x = 3,870.54

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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.