Home / 3,860.30-5,790.45-1,395.20

Finding the Fourth Proportional to 3,860.30, 5,790.45 and 1,395.20

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Solution

The fourth proportional to 3,860.30, 5,790.45 and 1,395.20 is: 2,092.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860.30 : 5,790.45 = 1,395.20 : x
  2. Step 2: Convert to fraction form
    3,860.30/5,790.45 = 1,395.20/x
  3. Step 3: Cross multiply
    3,860.30x = 5,790.45 × 1,395.20
  4. Step 4: Simplify right side
    3,860.30x = 8,078,835.84
  5. Step 5: Solve for x
    x = 8,078,835.84/3,860.30
  6. Step 6: Final answer
    x = 2,092.80

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Half scale
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Similar ratio
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1.5x scale

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.