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Finding the Fourth Proportional to 638,121.40, 957,009.30 and 188,841.40

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Solution

The fourth proportional to 638,121.40, 957,009.30 and 188,841.40 is: 283,210.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,121.40 : 957,009.30 = 188,841.40 : x
  2. Step 2: Convert to fraction form
    638,121.40/957,009.30 = 188,841.40/x
  3. Step 3: Cross multiply
    638,121.40x = 957,009.30 × 188,841.40
  4. Step 4: Simplify right side
    638,121.40x = 180,722,976,025.02
  5. Step 5: Solve for x
    x = 180,722,976,025.02/638,121.40
  6. Step 6: Final answer
    x = 283,210.96

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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.