Home / 2,230.21-3,077.76-1,286.31

Finding the Fourth Proportional to 2,230.21, 3,077.76 and 1,286.31

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Solution

The fourth proportional to 2,230.21, 3,077.76 and 1,286.31 is: 1,775.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.21 : 3,077.76 = 1,286.31 : x
  2. Step 2: Convert to fraction form
    2,230.21/3,077.76 = 1,286.31/x
  3. Step 3: Cross multiply
    2,230.21x = 3,077.76 × 1,286.31
  4. Step 4: Simplify right side
    2,230.21x = 3,958,953.47
  5. Step 5: Solve for x
    x = 3,958,953.47/2,230.21
  6. Step 6: Final answer
    x = 1,775.15

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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.