Home / 1,921.25-2,882.68-810.95

Finding the Fourth Proportional to 1,921.25, 2,882.68 and 810.95

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Solution

The fourth proportional to 1,921.25, 2,882.68 and 810.95 is: 1,216.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.25 : 2,882.68 = 810.95 : x
  2. Step 2: Convert to fraction form
    1,921.25/2,882.68 = 810.95/x
  3. Step 3: Cross multiply
    1,921.25x = 2,882.68 × 810.95
  4. Step 4: Simplify right side
    1,921.25x = 2,337,692.91
  5. Step 5: Solve for x
    x = 2,337,692.91/1,921.25
  6. Step 6: Final answer
    x = 1,216.75

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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.