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Finding the Fourth Proportional to 2,109.51, 3,163.41 and 876.33

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Solution

The fourth proportional to 2,109.51, 3,163.41 and 876.33 is: 1,314.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.51 : 3,163.41 = 876.33 : x
  2. Step 2: Convert to fraction form
    2,109.51/3,163.41 = 876.33/x
  3. Step 3: Cross multiply
    2,109.51x = 3,163.41 × 876.33
  4. Step 4: Simplify right side
    2,109.51x = 2,772,191.09
  5. Step 5: Solve for x
    x = 2,772,191.09/2,109.51
  6. Step 6: Final answer
    x = 1,314.14

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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.