Home / 2,195.70-3,299.40-1,209.30

Finding the Fourth Proportional to 2,195.70, 3,299.40 and 1,209.30

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Solution

The fourth proportional to 2,195.70, 3,299.40 and 1,209.30 is: 1,817.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,195.70 : 3,299.40 = 1,209.30 : x
  2. Step 2: Convert to fraction form
    2,195.70/3,299.40 = 1,209.30/x
  3. Step 3: Cross multiply
    2,195.70x = 3,299.40 × 1,209.30
  4. Step 4: Simplify right side
    2,195.70x = 3,989,964.42
  5. Step 5: Solve for x
    x = 3,989,964.42/2,195.70
  6. Step 6: Final answer
    x = 1,817.17

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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.