Home / 1,992.50-2,749.63-1,108.38

Finding the Fourth Proportional to 1,992.50, 2,749.63 and 1,108.38

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Solution

The fourth proportional to 1,992.50, 2,749.63 and 1,108.38 is: 1,529.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.50 : 2,749.63 = 1,108.38 : x
  2. Step 2: Convert to fraction form
    1,992.50/2,749.63 = 1,108.38/x
  3. Step 3: Cross multiply
    1,992.50x = 2,749.63 × 1,108.38
  4. Step 4: Simplify right side
    1,992.50x = 3,047,634.90
  5. Step 5: Solve for x
    x = 3,047,634.90/1,992.50
  6. Step 6: Final answer
    x = 1,529.55

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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.