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Finding the Fourth Proportional to 386,771.68, 533,754.12 and 217,018.36

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Solution

The fourth proportional to 386,771.68, 533,754.12 and 217,018.36 is: 299,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,771.68 : 533,754.12 = 217,018.36 : x
  2. Step 2: Convert to fraction form
    386,771.68/533,754.12 = 217,018.36/x
  3. Step 3: Cross multiply
    386,771.68x = 533,754.12 × 217,018.36
  4. Step 4: Simplify right side
    386,771.68x = 115,834,443,765.64
  5. Step 5: Solve for x
    x = 115,834,443,765.64/386,771.68
  6. Step 6: Final answer
    x = 299,490.50

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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.