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Finding the Fourth Proportional to 543,921.28, 815,491.11 and 255,570.32

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Solution

The fourth proportional to 543,921.28, 815,491.11 and 255,570.32 is: 383,171.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,921.28 : 815,491.11 = 255,570.32 : x
  2. Step 2: Convert to fraction form
    543,921.28/815,491.11 = 255,570.32/x
  3. Step 3: Cross multiply
    543,921.28x = 815,491.11 × 255,570.32
  4. Step 4: Simplify right side
    543,921.28x = 208,415,326,936.97
  5. Step 5: Solve for x
    x = 208,415,326,936.97/543,921.28
  6. Step 6: Final answer
    x = 383,171.86

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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.