Home / 2,080.40-3,121.20-619.52

Finding the Fourth Proportional to 2,080.40, 3,121.20 and 619.52

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Solution

The fourth proportional to 2,080.40, 3,121.20 and 619.52 is: 929.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.40 : 3,121.20 = 619.52 : x
  2. Step 2: Convert to fraction form
    2,080.40/3,121.20 = 619.52/x
  3. Step 3: Cross multiply
    2,080.40x = 3,121.20 × 619.52
  4. Step 4: Simplify right side
    2,080.40x = 1,933,645.82
  5. Step 5: Solve for x
    x = 1,933,645.82/2,080.40
  6. Step 6: Final answer
    x = 929.46

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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.