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Finding the Fourth Proportional to 326,074.80, 489,112.20 and 298,081.20

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Solution

The fourth proportional to 326,074.80, 489,112.20 and 298,081.20 is: 447,121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,074.80 : 489,112.20 = 298,081.20 : x
  2. Step 2: Convert to fraction form
    326,074.80/489,112.20 = 298,081.20/x
  3. Step 3: Cross multiply
    326,074.80x = 489,112.20 × 298,081.20
  4. Step 4: Simplify right side
    326,074.80x = 145,795,151,510.64
  5. Step 5: Solve for x
    x = 145,795,151,510.64/326,074.80
  6. Step 6: Final answer
    x = 447,121.80

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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.