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Finding the Fourth Proportional to 2,086.77, 3,125.97 and 992.19

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Solution

The fourth proportional to 2,086.77, 3,125.97 and 992.19 is: 1,486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.77 : 3,125.97 = 992.19 : x
  2. Step 2: Convert to fraction form
    2,086.77/3,125.97 = 992.19/x
  3. Step 3: Cross multiply
    2,086.77x = 3,125.97 × 992.19
  4. Step 4: Simplify right side
    2,086.77x = 3,101,556.17
  5. Step 5: Solve for x
    x = 3,101,556.17/2,086.77
  6. Step 6: Final answer
    x = 1,486.30

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1.5x scale

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.