Home / 2,858.06-4,279.80-2,788.40

Finding the Fourth Proportional to 2,858.06, 4,279.80 and 2,788.40

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Solution

The fourth proportional to 2,858.06, 4,279.80 and 2,788.40 is: 4,175.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.06 : 4,279.80 = 2,788.40 : x
  2. Step 2: Convert to fraction form
    2,858.06/4,279.80 = 2,788.40/x
  3. Step 3: Cross multiply
    2,858.06x = 4,279.80 × 2,788.40
  4. Step 4: Simplify right side
    2,858.06x = 11,933,794.32
  5. Step 5: Solve for x
    x = 11,933,794.32/2,858.06
  6. Step 6: Final answer
    x = 4,175.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.