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Finding the Fourth Proportional to 1,957.11, 2,936.07 and 658.41

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Solution

The fourth proportional to 1,957.11, 2,936.07 and 658.41 is: 987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,957.11 : 2,936.07 = 658.41 : x
  2. Step 2: Convert to fraction form
    1,957.11/2,936.07 = 658.41/x
  3. Step 3: Cross multiply
    1,957.11x = 2,936.07 × 658.41
  4. Step 4: Simplify right side
    1,957.11x = 1,933,137.85
  5. Step 5: Solve for x
    x = 1,933,137.85/1,957.11
  6. Step 6: Final answer
    x = 987.75

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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.