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Finding the Fourth Proportional to 326,817.78, 489,878.19 and 186,273.78

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Solution

The fourth proportional to 326,817.78, 489,878.19 and 186,273.78 is: 279,212.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,817.78 : 489,878.19 = 186,273.78 : x
  2. Step 2: Convert to fraction form
    326,817.78/489,878.19 = 186,273.78/x
  3. Step 3: Cross multiply
    326,817.78x = 489,878.19 × 186,273.78
  4. Step 4: Simplify right side
    326,817.78x = 91,251,462,190.86
  5. Step 5: Solve for x
    x = 91,251,462,190.86/326,817.78
  6. Step 6: Final answer
    x = 279,212.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.