Home / 2,080.40-3,119.91-693.35

Finding the Fourth Proportional to 2,080.40, 3,119.91 and 693.35

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Solution

The fourth proportional to 2,080.40, 3,119.91 and 693.35 is: 1,039.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.40 : 3,119.91 = 693.35 : x
  2. Step 2: Convert to fraction form
    2,080.40/3,119.91 = 693.35/x
  3. Step 3: Cross multiply
    2,080.40x = 3,119.91 × 693.35
  4. Step 4: Simplify right side
    2,080.40x = 2,163,183.10
  5. Step 5: Solve for x
    x = 2,163,183.10/2,080.40
  6. Step 6: Final answer
    x = 1,039.79

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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.