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Finding the Fourth Proportional to 1,881.27, 2,822.04 and 786.15

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Solution

The fourth proportional to 1,881.27, 2,822.04 and 786.15 is: 1,179.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.27 : 2,822.04 = 786.15 : x
  2. Step 2: Convert to fraction form
    1,881.27/2,822.04 = 786.15/x
  3. Step 3: Cross multiply
    1,881.27x = 2,822.04 × 786.15
  4. Step 4: Simplify right side
    1,881.27x = 2,218,546.75
  5. Step 5: Solve for x
    x = 2,218,546.75/1,881.27
  6. Step 6: Final answer
    x = 1,179.28

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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.