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Finding the Fourth Proportional to 1,640.41, 2,456.92 and 945.43

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Solution

The fourth proportional to 1,640.41, 2,456.92 and 945.43 is: 1,416.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.41 : 2,456.92 = 945.43 : x
  2. Step 2: Convert to fraction form
    1,640.41/2,456.92 = 945.43/x
  3. Step 3: Cross multiply
    1,640.41x = 2,456.92 × 945.43
  4. Step 4: Simplify right side
    1,640.41x = 2,322,845.88
  5. Step 5: Solve for x
    x = 2,322,845.88/1,640.41
  6. Step 6: Final answer
    x = 1,416.02

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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.