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Finding the Fourth Proportional to 399,476.73, 551,277.89 and 218,189.09

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Solution

The fourth proportional to 399,476.73, 551,277.89 and 218,189.09 is: 301,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,476.73 : 551,277.89 = 218,189.09 : x
  2. Step 2: Convert to fraction form
    399,476.73/551,277.89 = 218,189.09/x
  3. Step 3: Cross multiply
    399,476.73x = 551,277.89 × 218,189.09
  4. Step 4: Simplify right side
    399,476.73x = 120,282,822,261.68
  5. Step 5: Solve for x
    x = 120,282,822,261.68/399,476.73
  6. Step 6: Final answer
    x = 301,100.95

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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.