Home / 2,279.13-3,145.22-1,284.36

Finding the Fourth Proportional to 2,279.13, 3,145.22 and 1,284.36

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Solution

The fourth proportional to 2,279.13, 3,145.22 and 1,284.36 is: 1,772.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.13 : 3,145.22 = 1,284.36 : x
  2. Step 2: Convert to fraction form
    2,279.13/3,145.22 = 1,284.36/x
  3. Step 3: Cross multiply
    2,279.13x = 3,145.22 × 1,284.36
  4. Step 4: Simplify right side
    2,279.13x = 4,039,594.76
  5. Step 5: Solve for x
    x = 4,039,594.76/2,279.13
  6. Step 6: Final answer
    x = 1,772.43

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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.