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Finding the Fourth Proportional to 399,316.76, 551,052.96 and 218,028.14

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Solution

The fourth proportional to 399,316.76, 551,052.96 and 218,028.14 is: 300,876.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,316.76 : 551,052.96 = 218,028.14 : x
  2. Step 2: Convert to fraction form
    399,316.76/551,052.96 = 218,028.14/x
  3. Step 3: Cross multiply
    399,316.76x = 551,052.96 × 218,028.14
  4. Step 4: Simplify right side
    399,316.76x = 120,145,051,910.29
  5. Step 5: Solve for x
    x = 120,145,051,910.29/399,316.76
  6. Step 6: Final answer
    x = 300,876.56

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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.