Home / 2,109.80-2,911.52-1,226.11

Finding the Fourth Proportional to 2,109.80, 2,911.52 and 1,226.11

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Solution

The fourth proportional to 2,109.80, 2,911.52 and 1,226.11 is: 1,692.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.80 : 2,911.52 = 1,226.11 : x
  2. Step 2: Convert to fraction form
    2,109.80/2,911.52 = 1,226.11/x
  3. Step 3: Cross multiply
    2,109.80x = 2,911.52 × 1,226.11
  4. Step 4: Simplify right side
    2,109.80x = 3,569,849.77
  5. Step 5: Solve for x
    x = 3,569,849.77/2,109.80
  6. Step 6: Final answer
    x = 1,692.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.