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Finding the Fourth Proportional to 1,832.78, 2,749.79 and 1,218.91

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Solution

The fourth proportional to 1,832.78, 2,749.79 and 1,218.91 is: 1,828.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,832.78 : 2,749.79 = 1,218.91 : x
  2. Step 2: Convert to fraction form
    1,832.78/2,749.79 = 1,218.91/x
  3. Step 3: Cross multiply
    1,832.78x = 2,749.79 × 1,218.91
  4. Step 4: Simplify right side
    1,832.78x = 3,351,733.56
  5. Step 5: Solve for x
    x = 3,351,733.56/1,832.78
  6. Step 6: Final answer
    x = 1,828.77

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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.