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Finding the Fourth Proportional to 326,611.80, 489,917.75 and 101,991.47

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Solution

The fourth proportional to 326,611.80, 489,917.75 and 101,991.47 is: 152,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,611.80 : 489,917.75 = 101,991.47 : x
  2. Step 2: Convert to fraction form
    326,611.80/489,917.75 = 101,991.47/x
  3. Step 3: Cross multiply
    326,611.80x = 489,917.75 × 101,991.47
  4. Step 4: Simplify right side
    326,611.80x = 49,967,428,542.05
  5. Step 5: Solve for x
    x = 49,967,428,542.05/326,611.80
  6. Step 6: Final answer
    x = 152,987.21

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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.