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Finding the Fourth Proportional to 399,558.88, 551,366.88 and 218,234.08

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Solution

The fourth proportional to 399,558.88, 551,366.88 and 218,234.08 is: 301,149.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,558.88 : 551,366.88 = 218,234.08 : x
  2. Step 2: Convert to fraction form
    399,558.88/551,366.88 = 218,234.08/x
  3. Step 3: Cross multiply
    399,558.88x = 551,366.88 × 218,234.08
  4. Step 4: Simplify right side
    399,558.88x = 120,327,043,799.27
  5. Step 5: Solve for x
    x = 120,327,043,799.27/399,558.88
  6. Step 6: Final answer
    x = 301,149.72

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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.