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Finding the Fourth Proportional to 2,200, 3,036 and 1,315.84

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Solution

The fourth proportional to 2,200, 3,036 and 1,315.84 is: 1,815.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,200 : 3,036 = 1,315.84 : x
  2. Step 2: Convert to fraction form
    2,200/3,036 = 1,315.84/x
  3. Step 3: Cross multiply
    2,200x = 3,036 × 1,315.84
  4. Step 4: Simplify right side
    2,200x = 3,994,890.24
  5. Step 5: Solve for x
    x = 3,994,890.24/2,200
  6. Step 6: Final answer
    x = 1,815.86

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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.