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Finding the Fourth Proportional to 386,359.28, 533,201.40 and 216,604.40

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Solution

The fourth proportional to 386,359.28, 533,201.40 and 216,604.40 is: 298,928.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,359.28 : 533,201.40 = 216,604.40 : x
  2. Step 2: Convert to fraction form
    386,359.28/533,201.40 = 216,604.40/x
  3. Step 3: Cross multiply
    386,359.28x = 533,201.40 × 216,604.40
  4. Step 4: Simplify right side
    386,359.28x = 115,493,769,326.16
  5. Step 5: Solve for x
    x = 115,493,769,326.16/386,359.28
  6. Step 6: Final answer
    x = 298,928.42

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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.