Home / 3,116.28-4,674.42-807.78

Finding the Fourth Proportional to 3,116.28, 4,674.42 and 807.78

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Solution

The fourth proportional to 3,116.28, 4,674.42 and 807.78 is: 1,211.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,116.28 : 4,674.42 = 807.78 : x
  2. Step 2: Convert to fraction form
    3,116.28/4,674.42 = 807.78/x
  3. Step 3: Cross multiply
    3,116.28x = 4,674.42 × 807.78
  4. Step 4: Simplify right side
    3,116.28x = 3,775,902.99
  5. Step 5: Solve for x
    x = 3,775,902.99/3,116.28
  6. Step 6: Final answer
    x = 1,211.67

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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.