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Finding the Fourth Proportional to 2,584.58, 3,876.78 and 853.19

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Solution

The fourth proportional to 2,584.58, 3,876.78 and 853.19 is: 1,279.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,584.58 : 3,876.78 = 853.19 : x
  2. Step 2: Convert to fraction form
    2,584.58/3,876.78 = 853.19/x
  3. Step 3: Cross multiply
    2,584.58x = 3,876.78 × 853.19
  4. Step 4: Simplify right side
    2,584.58x = 3,307,629.93
  5. Step 5: Solve for x
    x = 3,307,629.93/2,584.58
  6. Step 6: Final answer
    x = 1,279.76

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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.