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Finding the Fourth Proportional to 2,688.93, 4,033.86 and 839.97

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Solution

The fourth proportional to 2,688.93, 4,033.86 and 839.97 is: 1,260.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.93 : 4,033.86 = 839.97 : x
  2. Step 2: Convert to fraction form
    2,688.93/4,033.86 = 839.97/x
  3. Step 3: Cross multiply
    2,688.93x = 4,033.86 × 839.97
  4. Step 4: Simplify right side
    2,688.93x = 3,388,321.38
  5. Step 5: Solve for x
    x = 3,388,321.38/2,688.93
  6. Step 6: Final answer
    x = 1,260.10

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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.