Home / 2,207.58-3,311.01-820.59

Finding the Fourth Proportional to 2,207.58, 3,311.01 and 820.59

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Solution

The fourth proportional to 2,207.58, 3,311.01 and 820.59 is: 1,230.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,207.58 : 3,311.01 = 820.59 : x
  2. Step 2: Convert to fraction form
    2,207.58/3,311.01 = 820.59/x
  3. Step 3: Cross multiply
    2,207.58x = 3,311.01 × 820.59
  4. Step 4: Simplify right side
    2,207.58x = 2,716,981.70
  5. Step 5: Solve for x
    x = 2,716,981.70/2,207.58
  6. Step 6: Final answer
    x = 1,230.75

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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.