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Finding the Fourth Proportional to 2,879.72, 3,974.01 and 1,637.72

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Solution

The fourth proportional to 2,879.72, 3,974.01 and 1,637.72 is: 2,260.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.72 : 3,974.01 = 1,637.72 : x
  2. Step 2: Convert to fraction form
    2,879.72/3,974.01 = 1,637.72/x
  3. Step 3: Cross multiply
    2,879.72x = 3,974.01 × 1,637.72
  4. Step 4: Simplify right side
    2,879.72x = 6,508,313.76
  5. Step 5: Solve for x
    x = 6,508,313.76/2,879.72
  6. Step 6: Final answer
    x = 2,260.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.