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Finding the Fourth Proportional to 2,490.81, 3,740.43 and 2,391.48

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Solution

The fourth proportional to 2,490.81, 3,740.43 and 2,391.48 is: 3,591.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.81 : 3,740.43 = 2,391.48 : x
  2. Step 2: Convert to fraction form
    2,490.81/3,740.43 = 2,391.48/x
  3. Step 3: Cross multiply
    2,490.81x = 3,740.43 × 2,391.48
  4. Step 4: Simplify right side
    2,490.81x = 8,945,163.54
  5. Step 5: Solve for x
    x = 8,945,163.54/2,490.81
  6. Step 6: Final answer
    x = 3,591.27

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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.