Home / 2,080.21-3,119.45-846.78

Finding the Fourth Proportional to 2,080.21, 3,119.45 and 846.78

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Solution

The fourth proportional to 2,080.21, 3,119.45 and 846.78 is: 1,269.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.21 : 3,119.45 = 846.78 : x
  2. Step 2: Convert to fraction form
    2,080.21/3,119.45 = 846.78/x
  3. Step 3: Cross multiply
    2,080.21x = 3,119.45 × 846.78
  4. Step 4: Simplify right side
    2,080.21x = 2,641,497.79
  5. Step 5: Solve for x
    x = 2,641,497.79/2,080.21
  6. Step 6: Final answer
    x = 1,269.82

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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.