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Finding the Fourth Proportional to 399,644.98, 551,503.56 and 218,353

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Solution

The fourth proportional to 399,644.98, 551,503.56 and 218,353 is: 301,323.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,644.98 : 551,503.56 = 218,353 : x
  2. Step 2: Convert to fraction form
    399,644.98/551,503.56 = 218,353/x
  3. Step 3: Cross multiply
    399,644.98x = 551,503.56 × 218,353
  4. Step 4: Simplify right side
    399,644.98x = 120,422,456,836.68
  5. Step 5: Solve for x
    x = 120,422,456,836.68/399,644.98
  6. Step 6: Final answer
    x = 301,323.58

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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.