Home / 2,279.58-3,145.74-1,284.80

Finding the Fourth Proportional to 2,279.58, 3,145.74 and 1,284.80

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Solution

The fourth proportional to 2,279.58, 3,145.74 and 1,284.80 is: 1,772.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.58 : 3,145.74 = 1,284.80 : x
  2. Step 2: Convert to fraction form
    2,279.58/3,145.74 = 1,284.80/x
  3. Step 3: Cross multiply
    2,279.58x = 3,145.74 × 1,284.80
  4. Step 4: Simplify right side
    2,279.58x = 4,041,646.75
  5. Step 5: Solve for x
    x = 4,041,646.75/2,279.58
  6. Step 6: Final answer
    x = 1,772.98

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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.