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Finding the Fourth Proportional to 1,960.80, 2,939.04 and 805.92

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Solution

The fourth proportional to 1,960.80, 2,939.04 and 805.92 is: 1,207.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.80 : 2,939.04 = 805.92 : x
  2. Step 2: Convert to fraction form
    1,960.80/2,939.04 = 805.92/x
  3. Step 3: Cross multiply
    1,960.80x = 2,939.04 × 805.92
  4. Step 4: Simplify right side
    1,960.80x = 2,368,631.12
  5. Step 5: Solve for x
    x = 2,368,631.12/1,960.80
  6. Step 6: Final answer
    x = 1,207.99

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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.