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Finding the Fourth Proportional to 386,780.62, 533,766.46 and 217,027.30

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Solution

The fourth proportional to 386,780.62, 533,766.46 and 217,027.30 is: 299,502.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,780.62 : 533,766.46 = 217,027.30 : x
  2. Step 2: Convert to fraction form
    386,780.62/533,766.46 = 217,027.30/x
  3. Step 3: Cross multiply
    386,780.62x = 533,766.46 × 217,027.30
  4. Step 4: Simplify right side
    386,780.62x = 115,841,891,767.37
  5. Step 5: Solve for x
    x = 115,841,891,767.37/386,780.62
  6. Step 6: Final answer
    x = 299,502.84

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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.