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Finding the Fourth Proportional to 399,327.25, 551,093.91 and 218,056.00

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Solution

The fourth proportional to 399,327.25, 551,093.91 and 218,056.00 is: 300,929.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,327.25 : 551,093.91 = 218,056.00 : x
  2. Step 2: Convert to fraction form
    399,327.25/551,093.91 = 218,056.00/x
  3. Step 3: Cross multiply
    399,327.25x = 551,093.91 × 218,056.00
  4. Step 4: Simplify right side
    399,327.25x = 120,169,332,261.23
  5. Step 5: Solve for x
    x = 120,169,332,261.23/399,327.25
  6. Step 6: Final answer
    x = 300,929.46

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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.