Home / 1,992.42-2,749.92-1,206.90

Finding the Fourth Proportional to 1,992.42, 2,749.92 and 1,206.90

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Solution

The fourth proportional to 1,992.42, 2,749.92 and 1,206.90 is: 1,665.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.42 : 2,749.92 = 1,206.90 : x
  2. Step 2: Convert to fraction form
    1,992.42/2,749.92 = 1,206.90/x
  3. Step 3: Cross multiply
    1,992.42x = 2,749.92 × 1,206.90
  4. Step 4: Simplify right side
    1,992.42x = 3,318,878.45
  5. Step 5: Solve for x
    x = 3,318,878.45/1,992.42
  6. Step 6: Final answer
    x = 1,665.75

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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.