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Finding the Fourth Proportional to 399,796.36, 551,709.63 and 218,509.45

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Solution

The fourth proportional to 399,796.36, 551,709.63 and 218,509.45 is: 301,537.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,796.36 : 551,709.63 = 218,509.45 : x
  2. Step 2: Convert to fraction form
    399,796.36/551,709.63 = 218,509.45/x
  3. Step 3: Cross multiply
    399,796.36x = 551,709.63 × 218,509.45
  4. Step 4: Simplify right side
    399,796.36x = 120,553,766,431.73
  5. Step 5: Solve for x
    x = 120,553,766,431.73/399,796.36
  6. Step 6: Final answer
    x = 301,537.93

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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.