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Finding the Fourth Proportional to 1,992.87, 2,749.21 and 1,692.90

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Solution

The fourth proportional to 1,992.87, 2,749.21 and 1,692.90 is: 2,335.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.87 : 2,749.21 = 1,692.90 : x
  2. Step 2: Convert to fraction form
    1,992.87/2,749.21 = 1,692.90/x
  3. Step 3: Cross multiply
    1,992.87x = 2,749.21 × 1,692.90
  4. Step 4: Simplify right side
    1,992.87x = 4,654,133.38
  5. Step 5: Solve for x
    x = 4,654,133.38/1,992.87
  6. Step 6: Final answer
    x = 2,335.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.