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Finding the Fourth Proportional to 886,906.10, 1,330,359.15 and 326,342.90

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Solution

The fourth proportional to 886,906.10, 1,330,359.15 and 326,342.90 is: 489,514.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,906.10 : 1,330,359.15 = 326,342.90 : x
  2. Step 2: Convert to fraction form
    886,906.10/1,330,359.15 = 326,342.90/x
  3. Step 3: Cross multiply
    886,906.10x = 1,330,359.15 × 326,342.90
  4. Step 4: Simplify right side
    886,906.10x = 434,153,263,052.54
  5. Step 5: Solve for x
    x = 434,153,263,052.54/886,906.10
  6. Step 6: Final answer
    x = 489,514.35

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Double scale
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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.