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Finding the Fourth Proportional to 3,305.92, 4,561.86 and 1,979.60

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Solution

The fourth proportional to 3,305.92, 4,561.86 and 1,979.60 is: 2,731.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,305.92 : 4,561.86 = 1,979.60 : x
  2. Step 2: Convert to fraction form
    3,305.92/4,561.86 = 1,979.60/x
  3. Step 3: Cross multiply
    3,305.92x = 4,561.86 × 1,979.60
  4. Step 4: Simplify right side
    3,305.92x = 9,030,658.06
  5. Step 5: Solve for x
    x = 9,030,658.06/3,305.92
  6. Step 6: Final answer
    x = 2,731.66

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1.5x scale

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.