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Finding the Fourth Proportional to 399,331.88, 551,089.33 and 218,055.32

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Solution

The fourth proportional to 399,331.88, 551,089.33 and 218,055.32 is: 300,922.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,331.88 : 551,089.33 = 218,055.32 : x
  2. Step 2: Convert to fraction form
    399,331.88/551,089.33 = 218,055.32/x
  3. Step 3: Cross multiply
    399,331.88x = 551,089.33 × 218,055.32
  4. Step 4: Simplify right side
    399,331.88x = 120,167,960,201.74
  5. Step 5: Solve for x
    x = 120,167,960,201.74/399,331.88
  6. Step 6: Final answer
    x = 300,922.53

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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.