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Finding the Fourth Proportional to 2,805.44, 3,868.80 and 2,511.68

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Solution

The fourth proportional to 2,805.44, 3,868.80 and 2,511.68 is: 3,463.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.44 : 3,868.80 = 2,511.68 : x
  2. Step 2: Convert to fraction form
    2,805.44/3,868.80 = 2,511.68/x
  3. Step 3: Cross multiply
    2,805.44x = 3,868.80 × 2,511.68
  4. Step 4: Simplify right side
    2,805.44x = 9,717,187.58
  5. Step 5: Solve for x
    x = 9,717,187.58/2,805.44
  6. Step 6: Final answer
    x = 3,463.69

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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.