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Finding the Fourth Proportional to 399,793.30, 551,714.76 and 218,505.22

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Solution

The fourth proportional to 399,793.30, 551,714.76 and 218,505.22 is: 301,537.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,793.30 : 551,714.76 = 218,505.22 : x
  2. Step 2: Convert to fraction form
    399,793.30/551,714.76 = 218,505.22/x
  3. Step 3: Cross multiply
    399,793.30x = 551,714.76 × 218,505.22
  4. Step 4: Simplify right side
    399,793.30x = 120,552,555,011.05
  5. Step 5: Solve for x
    x = 120,552,555,011.05/399,793.30
  6. Step 6: Final answer
    x = 301,537.21

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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.