Home / 2,191.40-3,286.16-804.28

Finding the Fourth Proportional to 2,191.40, 3,286.16 and 804.28

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Solution

The fourth proportional to 2,191.40, 3,286.16 and 804.28 is: 1,206.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.40 : 3,286.16 = 804.28 : x
  2. Step 2: Convert to fraction form
    2,191.40/3,286.16 = 804.28/x
  3. Step 3: Cross multiply
    2,191.40x = 3,286.16 × 804.28
  4. Step 4: Simplify right side
    2,191.40x = 2,642,992.76
  5. Step 5: Solve for x
    x = 2,642,992.76/2,191.40
  6. Step 6: Final answer
    x = 1,206.08

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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.