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Finding the Fourth Proportional to 605,812.20, 908,718.30 and 206,903.40

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Solution

The fourth proportional to 605,812.20, 908,718.30 and 206,903.40 is: 310,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,812.20 : 908,718.30 = 206,903.40 : x
  2. Step 2: Convert to fraction form
    605,812.20/908,718.30 = 206,903.40/x
  3. Step 3: Cross multiply
    605,812.20x = 908,718.30 × 206,903.40
  4. Step 4: Simplify right side
    605,812.20x = 188,016,905,912.22
  5. Step 5: Solve for x
    x = 188,016,905,912.22/605,812.20
  6. Step 6: Final answer
    x = 310,355.10

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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.