Home / 2,186.82-3,278.40-1,089.68

Finding the Fourth Proportional to 2,186.82, 3,278.40 and 1,089.68

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Solution

The fourth proportional to 2,186.82, 3,278.40 and 1,089.68 is: 1,633.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.82 : 3,278.40 = 1,089.68 : x
  2. Step 2: Convert to fraction form
    2,186.82/3,278.40 = 1,089.68/x
  3. Step 3: Cross multiply
    2,186.82x = 3,278.40 × 1,089.68
  4. Step 4: Simplify right side
    2,186.82x = 3,572,390.52
  5. Step 5: Solve for x
    x = 3,572,390.52/2,186.82
  6. Step 6: Final answer
    x = 1,633.60

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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.