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Finding the Fourth Proportional to 1,812.28, 2,716.29 and 771.97

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Solution

The fourth proportional to 1,812.28, 2,716.29 and 771.97 is: 1,157.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.28 : 2,716.29 = 771.97 : x
  2. Step 2: Convert to fraction form
    1,812.28/2,716.29 = 771.97/x
  3. Step 3: Cross multiply
    1,812.28x = 2,716.29 × 771.97
  4. Step 4: Simplify right side
    1,812.28x = 2,096,894.39
  5. Step 5: Solve for x
    x = 2,096,894.39/1,812.28
  6. Step 6: Final answer
    x = 1,157.05

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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.