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Finding the Fourth Proportional to 392,649.26, 541,841.22 and 239,942.80

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Solution

The fourth proportional to 392,649.26, 541,841.22 and 239,942.80 is: 331,112.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,649.26 : 541,841.22 = 239,942.80 : x
  2. Step 2: Convert to fraction form
    392,649.26/541,841.22 = 239,942.80/x
  3. Step 3: Cross multiply
    392,649.26x = 541,841.22 × 239,942.80
  4. Step 4: Simplify right side
    392,649.26x = 130,010,899,482.22
  5. Step 5: Solve for x
    x = 130,010,899,482.22/392,649.26
  6. Step 6: Final answer
    x = 331,112.05

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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.