Home / 3,106.68-4,288.14-1,988.28

Finding the Fourth Proportional to 3,106.68, 4,288.14 and 1,988.28

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Solution

The fourth proportional to 3,106.68, 4,288.14 and 1,988.28 is: 2,744.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.68 : 4,288.14 = 1,988.28 : x
  2. Step 2: Convert to fraction form
    3,106.68/4,288.14 = 1,988.28/x
  3. Step 3: Cross multiply
    3,106.68x = 4,288.14 × 1,988.28
  4. Step 4: Simplify right side
    3,106.68x = 8,526,023.00
  5. Step 5: Solve for x
    x = 8,526,023.00/3,106.68
  6. Step 6: Final answer
    x = 2,744.42

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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.