Home / 3,206.40-4,805.28-2,109.12

Finding the Fourth Proportional to 3,206.40, 4,805.28 and 2,109.12

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Solution

The fourth proportional to 3,206.40, 4,805.28 and 2,109.12 is: 3,160.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,206.40 : 4,805.28 = 2,109.12 : x
  2. Step 2: Convert to fraction form
    3,206.40/4,805.28 = 2,109.12/x
  3. Step 3: Cross multiply
    3,206.40x = 4,805.28 × 2,109.12
  4. Step 4: Simplify right side
    3,206.40x = 10,134,912.15
  5. Step 5: Solve for x
    x = 10,134,912.15/3,206.40
  6. Step 6: Final answer
    x = 3,160.84

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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.