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Finding the Fourth Proportional to 386,881.56, 533,896.56 and 217,115.64

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Solution

The fourth proportional to 386,881.56, 533,896.56 and 217,115.64 is: 299,619.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,881.56 : 533,896.56 = 217,115.64 : x
  2. Step 2: Convert to fraction form
    386,881.56/533,896.56 = 217,115.64/x
  3. Step 3: Cross multiply
    386,881.56x = 533,896.56 × 217,115.64
  4. Step 4: Simplify right side
    386,881.56x = 115,917,293,318.20
  5. Step 5: Solve for x
    x = 115,917,293,318.20/386,881.56
  6. Step 6: Final answer
    x = 299,619.59

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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.