Home / 2,080.15-3,120.23-693.70

Finding the Fourth Proportional to 2,080.15, 3,120.23 and 693.70

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Solution

The fourth proportional to 2,080.15, 3,120.23 and 693.70 is: 1,040.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.15 : 3,120.23 = 693.70 : x
  2. Step 2: Convert to fraction form
    2,080.15/3,120.23 = 693.70/x
  3. Step 3: Cross multiply
    2,080.15x = 3,120.23 × 693.70
  4. Step 4: Simplify right side
    2,080.15x = 2,164,503.55
  5. Step 5: Solve for x
    x = 2,164,503.55/2,080.15
  6. Step 6: Final answer
    x = 1,040.55

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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.