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Finding the Fourth Proportional to 638,585.40, 957,705.30 and 189,305.40

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Solution

The fourth proportional to 638,585.40, 957,705.30 and 189,305.40 is: 283,906.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,585.40 : 957,705.30 = 189,305.40 : x
  2. Step 2: Convert to fraction form
    638,585.40/957,705.30 = 189,305.40/x
  3. Step 3: Cross multiply
    638,585.40x = 957,705.30 × 189,305.40
  4. Step 4: Simplify right side
    638,585.40x = 181,298,784,898.62
  5. Step 5: Solve for x
    x = 181,298,784,898.62/638,585.40
  6. Step 6: Final answer
    x = 283,906.87

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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.