Home / 2,079.11-3,119.19-692.45

Finding the Fourth Proportional to 2,079.11, 3,119.19 and 692.45

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Solution

The fourth proportional to 2,079.11, 3,119.19 and 692.45 is: 1,038.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.11 : 3,119.19 = 692.45 : x
  2. Step 2: Convert to fraction form
    2,079.11/3,119.19 = 692.45/x
  3. Step 3: Cross multiply
    2,079.11x = 3,119.19 × 692.45
  4. Step 4: Simplify right side
    2,079.11x = 2,159,883.12
  5. Step 5: Solve for x
    x = 2,159,883.12/2,079.11
  6. Step 6: Final answer
    x = 1,038.85

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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.