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Finding the Fourth Proportional to 2,692.86, 4,036.91 and 936.65

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Solution

The fourth proportional to 2,692.86, 4,036.91 and 936.65 is: 1,404.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,692.86 : 4,036.91 = 936.65 : x
  2. Step 2: Convert to fraction form
    2,692.86/4,036.91 = 936.65/x
  3. Step 3: Cross multiply
    2,692.86x = 4,036.91 × 936.65
  4. Step 4: Simplify right side
    2,692.86x = 3,781,146.88
  5. Step 5: Solve for x
    x = 3,781,146.88/2,692.86
  6. Step 6: Final answer
    x = 1,404.14

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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.