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Finding the Fourth Proportional to 605,806.70, 908,710.05 and 206,897.90

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Solution

The fourth proportional to 605,806.70, 908,710.05 and 206,897.90 is: 310,346.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,806.70 : 908,710.05 = 206,897.90 : x
  2. Step 2: Convert to fraction form
    605,806.70/908,710.05 = 206,897.90/x
  3. Step 3: Cross multiply
    605,806.70x = 908,710.05 × 206,897.90
  4. Step 4: Simplify right side
    605,806.70x = 188,010,201,053.90
  5. Step 5: Solve for x
    x = 188,010,201,053.90/605,806.70
  6. Step 6: Final answer
    x = 310,346.85

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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.