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Finding the Fourth Proportional to 605,857.20, 908,785.80 and 206,948.40

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Solution

The fourth proportional to 605,857.20, 908,785.80 and 206,948.40 is: 310,422.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,857.20 : 908,785.80 = 206,948.40 : x
  2. Step 2: Convert to fraction form
    605,857.20/908,785.80 = 206,948.40/x
  3. Step 3: Cross multiply
    605,857.20x = 908,785.80 × 206,948.40
  4. Step 4: Simplify right side
    605,857.20x = 188,071,767,252.72
  5. Step 5: Solve for x
    x = 188,071,767,252.72/605,857.20
  6. Step 6: Final answer
    x = 310,422.60

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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.