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Finding the Fourth Proportional to 605,815.20, 908,722.80 and 206,906.40

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Solution

The fourth proportional to 605,815.20, 908,722.80 and 206,906.40 is: 310,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,815.20 : 908,722.80 = 206,906.40 : x
  2. Step 2: Convert to fraction form
    605,815.20/908,722.80 = 206,906.40/x
  3. Step 3: Cross multiply
    605,815.20x = 908,722.80 × 206,906.40
  4. Step 4: Simplify right side
    605,815.20x = 188,020,563,145.92
  5. Step 5: Solve for x
    x = 188,020,563,145.92/605,815.20
  6. Step 6: Final answer
    x = 310,359.60

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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.