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Finding the Fourth Proportional to 2,942.88, 4,414.19 and 862.80

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Solution

The fourth proportional to 2,942.88, 4,414.19 and 862.80 is: 1,294.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,942.88 : 4,414.19 = 862.80 : x
  2. Step 2: Convert to fraction form
    2,942.88/4,414.19 = 862.80/x
  3. Step 3: Cross multiply
    2,942.88x = 4,414.19 × 862.80
  4. Step 4: Simplify right side
    2,942.88x = 3,808,558.82
  5. Step 5: Solve for x
    x = 3,808,558.82/2,942.88
  6. Step 6: Final answer
    x = 1,294.16

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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.