Home / 2,279.13-3,145.35-1,284.51

Finding the Fourth Proportional to 2,279.13, 3,145.35 and 1,284.51

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Solution

The fourth proportional to 2,279.13, 3,145.35 and 1,284.51 is: 1,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.13 : 3,145.35 = 1,284.51 : x
  2. Step 2: Convert to fraction form
    2,279.13/3,145.35 = 1,284.51/x
  3. Step 3: Cross multiply
    2,279.13x = 3,145.35 × 1,284.51
  4. Step 4: Simplify right side
    2,279.13x = 4,040,233.53
  5. Step 5: Solve for x
    x = 4,040,233.53/2,279.13
  6. Step 6: Final answer
    x = 1,772.71

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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.