Home / 2,151.76-3,227.85-690.57

Finding the Fourth Proportional to 2,151.76, 3,227.85 and 690.57

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Solution

The fourth proportional to 2,151.76, 3,227.85 and 690.57 is: 1,035.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.76 : 3,227.85 = 690.57 : x
  2. Step 2: Convert to fraction form
    2,151.76/3,227.85 = 690.57/x
  3. Step 3: Cross multiply
    2,151.76x = 3,227.85 × 690.57
  4. Step 4: Simplify right side
    2,151.76x = 2,229,056.37
  5. Step 5: Solve for x
    x = 2,229,056.37/2,151.76
  6. Step 6: Final answer
    x = 1,035.92

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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.