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Finding the Fourth Proportional to 279,520.86, 385,793.40 and 177,664.98

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Solution

The fourth proportional to 279,520.86, 385,793.40 and 177,664.98 is: 245,212.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,520.86 : 385,793.40 = 177,664.98 : x
  2. Step 2: Convert to fraction form
    279,520.86/385,793.40 = 177,664.98/x
  3. Step 3: Cross multiply
    279,520.86x = 385,793.40 × 177,664.98
  4. Step 4: Simplify right side
    279,520.86x = 68,541,976,695.13
  5. Step 5: Solve for x
    x = 68,541,976,695.13/279,520.86
  6. Step 6: Final answer
    x = 245,212.38

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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.