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Finding the Fourth Proportional to 638,144.80, 956,878.58 and 188,803.78

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Solution

The fourth proportional to 638,144.80, 956,878.58 and 188,803.78 is: 283,105.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,144.80 : 956,878.58 = 188,803.78 : x
  2. Step 2: Convert to fraction form
    638,144.80/956,878.58 = 188,803.78/x
  3. Step 3: Cross multiply
    638,144.80x = 956,878.58 × 188,803.78
  4. Step 4: Simplify right side
    638,144.80x = 180,662,292,905.03
  5. Step 5: Solve for x
    x = 180,662,292,905.03/638,144.80
  6. Step 6: Final answer
    x = 283,105.48

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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.