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Finding the Fourth Proportional to 489,108.40, 733,662.60 and 321,146.80

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Solution

The fourth proportional to 489,108.40, 733,662.60 and 321,146.80 is: 481,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,108.40 : 733,662.60 = 321,146.80 : x
  2. Step 2: Convert to fraction form
    489,108.40/733,662.60 = 321,146.80/x
  3. Step 3: Cross multiply
    489,108.40x = 733,662.60 × 321,146.80
  4. Step 4: Simplify right side
    489,108.40x = 235,613,396,269.68
  5. Step 5: Solve for x
    x = 235,613,396,269.68/489,108.40
  6. Step 6: Final answer
    x = 481,720.20

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Similar ratio
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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.