Home / 2,121.50-3,180.34-1,080.92

Finding the Fourth Proportional to 2,121.50, 3,180.34 and 1,080.92

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Solution

The fourth proportional to 2,121.50, 3,180.34 and 1,080.92 is: 1,620.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.50 : 3,180.34 = 1,080.92 : x
  2. Step 2: Convert to fraction form
    2,121.50/3,180.34 = 1,080.92/x
  3. Step 3: Cross multiply
    2,121.50x = 3,180.34 × 1,080.92
  4. Step 4: Simplify right side
    2,121.50x = 3,437,693.11
  5. Step 5: Solve for x
    x = 3,437,693.11/2,121.50
  6. Step 6: Final answer
    x = 1,620.41

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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.