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Finding the Fourth Proportional to 326,420.08, 489,170.46 and 259,563.52

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Solution

The fourth proportional to 326,420.08, 489,170.46 and 259,563.52 is: 388,979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,420.08 : 489,170.46 = 259,563.52 : x
  2. Step 2: Convert to fraction form
    326,420.08/489,170.46 = 259,563.52/x
  3. Step 3: Cross multiply
    326,420.08x = 489,170.46 × 259,563.52
  4. Step 4: Simplify right side
    326,420.08x = 126,970,806,477.62
  5. Step 5: Solve for x
    x = 126,970,806,477.62/326,420.08
  6. Step 6: Final answer
    x = 388,979.77

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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.