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Finding the Fourth Proportional to 2,859, 3,945.48 and 1,617

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Solution

The fourth proportional to 2,859, 3,945.48 and 1,617 is: 2,231.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859 : 3,945.48 = 1,617 : x
  2. Step 2: Convert to fraction form
    2,859/3,945.48 = 1,617/x
  3. Step 3: Cross multiply
    2,859x = 3,945.48 × 1,617
  4. Step 4: Simplify right side
    2,859x = 6,379,841.16
  5. Step 5: Solve for x
    x = 6,379,841.16/2,859
  6. Step 6: Final answer
    x = 2,231.49

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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.