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Finding the Fourth Proportional to 396,393.12, 547,098 and 235,336.48

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Solution

The fourth proportional to 396,393.12, 547,098 and 235,336.48 is: 324,809.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,393.12 : 547,098 = 235,336.48 : x
  2. Step 2: Convert to fraction form
    396,393.12/547,098 = 235,336.48/x
  3. Step 3: Cross multiply
    396,393.12x = 547,098 × 235,336.48
  4. Step 4: Simplify right side
    396,393.12x = 128,752,117,535.04
  5. Step 5: Solve for x
    x = 128,752,117,535.04/396,393.12
  6. Step 6: Final answer
    x = 324,809.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.