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Finding the Fourth Proportional to 399,390.38, 551,229.92 and 236,040.22

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Solution

The fourth proportional to 399,390.38, 551,229.92 and 236,040.22 is: 325,777.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,390.38 : 551,229.92 = 236,040.22 : x
  2. Step 2: Convert to fraction form
    399,390.38/551,229.92 = 236,040.22/x
  3. Step 3: Cross multiply
    399,390.38x = 551,229.92 × 236,040.22
  4. Step 4: Simplify right side
    399,390.38x = 130,112,427,651.03
  5. Step 5: Solve for x
    x = 130,112,427,651.03/399,390.38
  6. Step 6: Final answer
    x = 325,777.57

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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.