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Finding the Fourth Proportional to 2,079.33, 3,119.49 and 692.68

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Solution

The fourth proportional to 2,079.33, 3,119.49 and 692.68 is: 1,039.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.33 : 3,119.49 = 692.68 : x
  2. Step 2: Convert to fraction form
    2,079.33/3,119.49 = 692.68/x
  3. Step 3: Cross multiply
    2,079.33x = 3,119.49 × 692.68
  4. Step 4: Simplify right side
    2,079.33x = 2,160,792.74
  5. Step 5: Solve for x
    x = 2,160,792.74/2,079.33
  6. Step 6: Final answer
    x = 1,039.18

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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.