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Finding the Fourth Proportional to 386,772.68, 533,755.50 and 217,019.36

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Solution

The fourth proportional to 386,772.68, 533,755.50 and 217,019.36 is: 299,491.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,772.68 : 533,755.50 = 217,019.36 : x
  2. Step 2: Convert to fraction form
    386,772.68/533,755.50 = 217,019.36/x
  3. Step 3: Cross multiply
    386,772.68x = 533,755.50 × 217,019.36
  4. Step 4: Simplify right side
    386,772.68x = 115,835,277,006.48
  5. Step 5: Solve for x
    x = 115,835,277,006.48/386,772.68
  6. Step 6: Final answer
    x = 299,491.88

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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.