Home / 3,858.30-5,320.80-2,803.05

Finding the Fourth Proportional to 3,858.30, 5,320.80 and 2,803.05

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Solution

The fourth proportional to 3,858.30, 5,320.80 and 2,803.05 is: 3,865.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.30 : 5,320.80 = 2,803.05 : x
  2. Step 2: Convert to fraction form
    3,858.30/5,320.80 = 2,803.05/x
  3. Step 3: Cross multiply
    3,858.30x = 5,320.80 × 2,803.05
  4. Step 4: Simplify right side
    3,858.30x = 14,914,468.44
  5. Step 5: Solve for x
    x = 14,914,468.44/3,858.30
  6. Step 6: Final answer
    x = 3,865.55

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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.