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Finding the Fourth Proportional to 2,696.28, 4,042.94 and 940.81

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Solution

The fourth proportional to 2,696.28, 4,042.94 and 940.81 is: 1,410.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,696.28 : 4,042.94 = 940.81 : x
  2. Step 2: Convert to fraction form
    2,696.28/4,042.94 = 940.81/x
  3. Step 3: Cross multiply
    2,696.28x = 4,042.94 × 940.81
  4. Step 4: Simplify right side
    2,696.28x = 3,803,638.38
  5. Step 5: Solve for x
    x = 3,803,638.38/2,696.28
  6. Step 6: Final answer
    x = 1,410.70

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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.