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Finding the Fourth Proportional to 392,415.03, 541,636.29 and 231,377.36

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Solution

The fourth proportional to 392,415.03, 541,636.29 and 231,377.36 is: 319,361.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,415.03 : 541,636.29 = 231,377.36 : x
  2. Step 2: Convert to fraction form
    392,415.03/541,636.29 = 231,377.36/x
  3. Step 3: Cross multiply
    392,415.03x = 541,636.29 × 231,377.36
  4. Step 4: Simplify right side
    392,415.03x = 125,322,372,152.21
  5. Step 5: Solve for x
    x = 125,322,372,152.21/392,415.03
  6. Step 6: Final answer
    x = 319,361.80

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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.