Home / 2,120.20-3,180.26-870.52

Finding the Fourth Proportional to 2,120.20, 3,180.26 and 870.52

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Solution

The fourth proportional to 2,120.20, 3,180.26 and 870.52 is: 1,305.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.20 : 3,180.26 = 870.52 : x
  2. Step 2: Convert to fraction form
    2,120.20/3,180.26 = 870.52/x
  3. Step 3: Cross multiply
    2,120.20x = 3,180.26 × 870.52
  4. Step 4: Simplify right side
    2,120.20x = 2,768,459.68
  5. Step 5: Solve for x
    x = 2,768,459.68/2,120.20
  6. Step 6: Final answer
    x = 1,305.76

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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.