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Finding the Fourth Proportional to 2,129.81, 3,192.02 and 958.56

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Solution

The fourth proportional to 2,129.81, 3,192.02 and 958.56 is: 1,436.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.81 : 3,192.02 = 958.56 : x
  2. Step 2: Convert to fraction form
    2,129.81/3,192.02 = 958.56/x
  3. Step 3: Cross multiply
    2,129.81x = 3,192.02 × 958.56
  4. Step 4: Simplify right side
    2,129.81x = 3,059,737.90
  5. Step 5: Solve for x
    x = 3,059,737.90/2,129.81
  6. Step 6: Final answer
    x = 1,436.63

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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.