Home / 2,079.50-3,119.13-692.78

Finding the Fourth Proportional to 2,079.50, 3,119.13 and 692.78

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Solution

The fourth proportional to 2,079.50, 3,119.13 and 692.78 is: 1,039.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.50 : 3,119.13 = 692.78 : x
  2. Step 2: Convert to fraction form
    2,079.50/3,119.13 = 692.78/x
  3. Step 3: Cross multiply
    2,079.50x = 3,119.13 × 692.78
  4. Step 4: Simplify right side
    2,079.50x = 2,160,855.29
  5. Step 5: Solve for x
    x = 2,160,855.29/2,079.50
  6. Step 6: Final answer
    x = 1,039.13

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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.