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Finding the Fourth Proportional to 1,283.92, 1,922.22 and 1,181.86

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Solution

The fourth proportional to 1,283.92, 1,922.22 and 1,181.86 is: 1,769.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.92 : 1,922.22 = 1,181.86 : x
  2. Step 2: Convert to fraction form
    1,283.92/1,922.22 = 1,181.86/x
  3. Step 3: Cross multiply
    1,283.92x = 1,922.22 × 1,181.86
  4. Step 4: Simplify right side
    1,283.92x = 2,271,794.93
  5. Step 5: Solve for x
    x = 2,271,794.93/1,283.92
  6. Step 6: Final answer
    x = 1,769.42

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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.