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Finding the Fourth Proportional to 1,960.87, 2,942.13 and 1,221.10

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Solution

The fourth proportional to 1,960.87, 2,942.13 and 1,221.10 is: 1,832.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.87 : 2,942.13 = 1,221.10 : x
  2. Step 2: Convert to fraction form
    1,960.87/2,942.13 = 1,221.10/x
  3. Step 3: Cross multiply
    1,960.87x = 2,942.13 × 1,221.10
  4. Step 4: Simplify right side
    1,960.87x = 3,592,634.94
  5. Step 5: Solve for x
    x = 3,592,634.94/1,960.87
  6. Step 6: Final answer
    x = 1,832.16

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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.