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Finding the Fourth Proportional to 3,761.91, 5,192.81 and 2,190

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Solution

The fourth proportional to 3,761.91, 5,192.81 and 2,190 is: 3,023.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.91 : 5,192.81 = 2,190 : x
  2. Step 2: Convert to fraction form
    3,761.91/5,192.81 = 2,190/x
  3. Step 3: Cross multiply
    3,761.91x = 5,192.81 × 2,190
  4. Step 4: Simplify right side
    3,761.91x = 11,372,242.95
  5. Step 5: Solve for x
    x = 11,372,242.95/3,761.91
  6. Step 6: Final answer
    x = 3,023.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.