Home / 2,139.12-3,202.80-1,479.60

Finding the Fourth Proportional to 2,139.12, 3,202.80 and 1,479.60

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Solution

The fourth proportional to 2,139.12, 3,202.80 and 1,479.60 is: 2,215.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.12 : 3,202.80 = 1,479.60 : x
  2. Step 2: Convert to fraction form
    2,139.12/3,202.80 = 1,479.60/x
  3. Step 3: Cross multiply
    2,139.12x = 3,202.80 × 1,479.60
  4. Step 4: Simplify right side
    2,139.12x = 4,738,862.88
  5. Step 5: Solve for x
    x = 4,738,862.88/2,139.12
  6. Step 6: Final answer
    x = 2,215.33

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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.