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Finding the Fourth Proportional to 489,414.40, 734,121.60 and 321,992.80

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Solution

The fourth proportional to 489,414.40, 734,121.60 and 321,992.80 is: 482,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,414.40 : 734,121.60 = 321,992.80 : x
  2. Step 2: Convert to fraction form
    489,414.40/734,121.60 = 321,992.80/x
  3. Step 3: Cross multiply
    489,414.40x = 734,121.60 × 321,992.80
  4. Step 4: Simplify right side
    489,414.40x = 236,381,869,524.48
  5. Step 5: Solve for x
    x = 236,381,869,524.48/489,414.40
  6. Step 6: Final answer
    x = 482,989.20

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1.5x scale

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.