Home / 2,208.16-3,311.50-891.57

Finding the Fourth Proportional to 2,208.16, 3,311.50 and 891.57

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Solution

The fourth proportional to 2,208.16, 3,311.50 and 891.57 is: 1,337.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.16 : 3,311.50 = 891.57 : x
  2. Step 2: Convert to fraction form
    2,208.16/3,311.50 = 891.57/x
  3. Step 3: Cross multiply
    2,208.16x = 3,311.50 × 891.57
  4. Step 4: Simplify right side
    2,208.16x = 2,952,425.78
  5. Step 5: Solve for x
    x = 2,952,425.78/2,208.16
  6. Step 6: Final answer
    x = 1,337.06

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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.