Home / 3,119.25-4,679.15-810.75

Finding the Fourth Proportional to 3,119.25, 4,679.15 and 810.75

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Solution

The fourth proportional to 3,119.25, 4,679.15 and 810.75 is: 1,216.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.25 : 4,679.15 = 810.75 : x
  2. Step 2: Convert to fraction form
    3,119.25/4,679.15 = 810.75/x
  3. Step 3: Cross multiply
    3,119.25x = 4,679.15 × 810.75
  4. Step 4: Simplify right side
    3,119.25x = 3,793,616.81
  5. Step 5: Solve for x
    x = 3,793,616.81/3,119.25
  6. Step 6: Final answer
    x = 1,216.20

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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.