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Finding the Fourth Proportional to 2,815, 4,222.56 and 867.37

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Solution

The fourth proportional to 2,815, 4,222.56 and 867.37 is: 1,301.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815 : 4,222.56 = 867.37 : x
  2. Step 2: Convert to fraction form
    2,815/4,222.56 = 867.37/x
  3. Step 3: Cross multiply
    2,815x = 4,222.56 × 867.37
  4. Step 4: Simplify right side
    2,815x = 3,662,521.87
  5. Step 5: Solve for x
    x = 3,662,521.87/2,815
  6. Step 6: Final answer
    x = 1,301.07

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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.