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Finding the Fourth Proportional to 1,961.49, 2,942.63 and 574.87

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Solution

The fourth proportional to 1,961.49, 2,942.63 and 574.87 is: 862.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.49 : 2,942.63 = 574.87 : x
  2. Step 2: Convert to fraction form
    1,961.49/2,942.63 = 574.87/x
  3. Step 3: Cross multiply
    1,961.49x = 2,942.63 × 574.87
  4. Step 4: Simplify right side
    1,961.49x = 1,691,624.87
  5. Step 5: Solve for x
    x = 1,691,624.87/1,961.49
  6. Step 6: Final answer
    x = 862.42

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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.