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Finding the Fourth Proportional to 399,729.45, 551,633.45 and 238,553.22

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Solution

The fourth proportional to 399,729.45, 551,633.45 and 238,553.22 is: 329,207.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,729.45 : 551,633.45 = 238,553.22 : x
  2. Step 2: Convert to fraction form
    399,729.45/551,633.45 = 238,553.22/x
  3. Step 3: Cross multiply
    399,729.45x = 551,633.45 × 238,553.22
  4. Step 4: Simplify right side
    399,729.45x = 131,593,934,564.44
  5. Step 5: Solve for x
    x = 131,593,934,564.44/399,729.45
  6. Step 6: Final answer
    x = 329,207.50

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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.