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Finding the Fourth Proportional to 2,945.97, 4,418.89 and 865.92

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Solution

The fourth proportional to 2,945.97, 4,418.89 and 865.92 is: 1,298.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,945.97 : 4,418.89 = 865.92 : x
  2. Step 2: Convert to fraction form
    2,945.97/4,418.89 = 865.92/x
  3. Step 3: Cross multiply
    2,945.97x = 4,418.89 × 865.92
  4. Step 4: Simplify right side
    2,945.97x = 3,826,403.06
  5. Step 5: Solve for x
    x = 3,826,403.06/2,945.97
  6. Step 6: Final answer
    x = 1,298.86

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1.5x scale

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.