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Finding the Fourth Proportional to 326,422.80, 489,634.20 and 302,803.20

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Solution

The fourth proportional to 326,422.80, 489,634.20 and 302,803.20 is: 454,204.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,422.80 : 489,634.20 = 302,803.20 : x
  2. Step 2: Convert to fraction form
    326,422.80/489,634.20 = 302,803.20/x
  3. Step 3: Cross multiply
    326,422.80x = 489,634.20 × 302,803.20
  4. Step 4: Simplify right side
    326,422.80x = 148,262,802,589.44
  5. Step 5: Solve for x
    x = 148,262,802,589.44/326,422.80
  6. Step 6: Final answer
    x = 454,204.80

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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.