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Finding the Fourth Proportional to 2,692.70, 4,039.50 and 843.38

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Solution

The fourth proportional to 2,692.70, 4,039.50 and 843.38 is: 1,265.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,692.70 : 4,039.50 = 843.38 : x
  2. Step 2: Convert to fraction form
    2,692.70/4,039.50 = 843.38/x
  3. Step 3: Cross multiply
    2,692.70x = 4,039.50 × 843.38
  4. Step 4: Simplify right side
    2,692.70x = 3,406,833.51
  5. Step 5: Solve for x
    x = 3,406,833.51/2,692.70
  6. Step 6: Final answer
    x = 1,265.21

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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.