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Finding the Fourth Proportional to 392,489.71, 541,629.24 and 220,409.26

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Solution

The fourth proportional to 392,489.71, 541,629.24 and 220,409.26 is: 304,161.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,489.71 : 541,629.24 = 220,409.26 : x
  2. Step 2: Convert to fraction form
    392,489.71/541,629.24 = 220,409.26/x
  3. Step 3: Cross multiply
    392,489.71x = 541,629.24 × 220,409.26
  4. Step 4: Simplify right side
    392,489.71x = 119,380,099,982.76
  5. Step 5: Solve for x
    x = 119,380,099,982.76/392,489.71
  6. Step 6: Final answer
    x = 304,161.10

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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.