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Finding the Fourth Proportional to 619,710.27, 855,979.68 and 511,207.80

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Solution

The fourth proportional to 619,710.27, 855,979.68 and 511,207.80 is: 706,109.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,710.27 : 855,979.68 = 511,207.80 : x
  2. Step 2: Convert to fraction form
    619,710.27/855,979.68 = 511,207.80/x
  3. Step 3: Cross multiply
    619,710.27x = 855,979.68 × 511,207.80
  4. Step 4: Simplify right side
    619,710.27x = 437,583,489,057.50
  5. Step 5: Solve for x
    x = 437,583,489,057.50/619,710.27
  6. Step 6: Final answer
    x = 706,109.79

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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.