Home / 2,286.18-3,154.91-1,291.78

Finding the Fourth Proportional to 2,286.18, 3,154.91 and 1,291.78

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Solution

The fourth proportional to 2,286.18, 3,154.91 and 1,291.78 is: 1,782.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,286.18 : 3,154.91 = 1,291.78 : x
  2. Step 2: Convert to fraction form
    2,286.18/3,154.91 = 1,291.78/x
  3. Step 3: Cross multiply
    2,286.18x = 3,154.91 × 1,291.78
  4. Step 4: Simplify right side
    2,286.18x = 4,075,449.64
  5. Step 5: Solve for x
    x = 4,075,449.64/2,286.18
  6. Step 6: Final answer
    x = 1,782.65

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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.