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Finding the Fourth Proportional to 386,847.70, 533,850.14 and 217,081.82

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Solution

The fourth proportional to 386,847.70, 533,850.14 and 217,081.82 is: 299,573.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,847.70 : 533,850.14 = 217,081.82 : x
  2. Step 2: Convert to fraction form
    386,847.70/533,850.14 = 217,081.82/x
  3. Step 3: Cross multiply
    386,847.70x = 533,850.14 × 217,081.82
  4. Step 4: Simplify right side
    386,847.70x = 115,889,161,875.79
  5. Step 5: Solve for x
    x = 115,889,161,875.79/386,847.70
  6. Step 6: Final answer
    x = 299,573.09

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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.