Home / 2,080.11-3,120.69-693.45

Finding the Fourth Proportional to 2,080.11, 3,120.69 and 693.45

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Solution

The fourth proportional to 2,080.11, 3,120.69 and 693.45 is: 1,040.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.11 : 3,120.69 = 693.45 : x
  2. Step 2: Convert to fraction form
    2,080.11/3,120.69 = 693.45/x
  3. Step 3: Cross multiply
    2,080.11x = 3,120.69 × 693.45
  4. Step 4: Simplify right side
    2,080.11x = 2,164,042.48
  5. Step 5: Solve for x
    x = 2,164,042.48/2,080.11
  6. Step 6: Final answer
    x = 1,040.35

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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.