Home / 2,230.68-3,078.36-1,286.64

Finding the Fourth Proportional to 2,230.68, 3,078.36 and 1,286.64

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Solution

The fourth proportional to 2,230.68, 3,078.36 and 1,286.64 is: 1,775.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.68 : 3,078.36 = 1,286.64 : x
  2. Step 2: Convert to fraction form
    2,230.68/3,078.36 = 1,286.64/x
  3. Step 3: Cross multiply
    2,230.68x = 3,078.36 × 1,286.64
  4. Step 4: Simplify right side
    2,230.68x = 3,960,741.11
  5. Step 5: Solve for x
    x = 3,960,741.11/2,230.68
  6. Step 6: Final answer
    x = 1,775.58

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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.