Home / 2,080.61-3,121.37-619.88

Finding the Fourth Proportional to 2,080.61, 3,121.37 and 619.88

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Solution

The fourth proportional to 2,080.61, 3,121.37 and 619.88 is: 929.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.61 : 3,121.37 = 619.88 : x
  2. Step 2: Convert to fraction form
    2,080.61/3,121.37 = 619.88/x
  3. Step 3: Cross multiply
    2,080.61x = 3,121.37 × 619.88
  4. Step 4: Simplify right side
    2,080.61x = 1,934,871.74
  5. Step 5: Solve for x
    x = 1,934,871.74/2,080.61
  6. Step 6: Final answer
    x = 929.95

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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.