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Finding the Fourth Proportional to 322,456.60, 483,684.90 and 85,823.20

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Solution

The fourth proportional to 322,456.60, 483,684.90 and 85,823.20 is: 128,734.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,456.60 : 483,684.90 = 85,823.20 : x
  2. Step 2: Convert to fraction form
    322,456.60/483,684.90 = 85,823.20/x
  3. Step 3: Cross multiply
    322,456.60x = 483,684.90 × 85,823.20
  4. Step 4: Simplify right side
    322,456.60x = 41,511,385,909.68
  5. Step 5: Solve for x
    x = 41,511,385,909.68/322,456.60
  6. Step 6: Final answer
    x = 128,734.80

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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.