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Finding the Fourth Proportional to 1,881.72, 2,823 and 727.56

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Solution

The fourth proportional to 1,881.72, 2,823 and 727.56 is: 1,091.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.72 : 2,823 = 727.56 : x
  2. Step 2: Convert to fraction form
    1,881.72/2,823 = 727.56/x
  3. Step 3: Cross multiply
    1,881.72x = 2,823 × 727.56
  4. Step 4: Simplify right side
    1,881.72x = 2,053,901.88
  5. Step 5: Solve for x
    x = 2,053,901.88/1,881.72
  6. Step 6: Final answer
    x = 1,091.50

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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.