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Finding the Fourth Proportional to 399,326.67, 551,093.14 and 218,055.43

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Solution

The fourth proportional to 399,326.67, 551,093.14 and 218,055.43 is: 300,928.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,326.67 : 551,093.14 = 218,055.43 : x
  2. Step 2: Convert to fraction form
    399,326.67/551,093.14 = 218,055.43/x
  3. Step 3: Cross multiply
    399,326.67x = 551,093.14 × 218,055.43
  4. Step 4: Simplify right side
    399,326.67x = 120,168,851,756.48
  5. Step 5: Solve for x
    x = 120,168,851,756.48/399,326.67
  6. Step 6: Final answer
    x = 300,928.69

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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.