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Finding the Fourth Proportional to 619,711.27, 855,981.06 and 511,208.80

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Solution

The fourth proportional to 619,711.27, 855,981.06 and 511,208.80 is: 706,111.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,711.27 : 855,981.06 = 511,208.80 : x
  2. Step 2: Convert to fraction form
    619,711.27/855,981.06 = 511,208.80/x
  3. Step 3: Cross multiply
    619,711.27x = 855,981.06 × 511,208.80
  4. Step 4: Simplify right side
    619,711.27x = 437,585,050,505.33
  5. Step 5: Solve for x
    x = 437,585,050,505.33/619,711.27
  6. Step 6: Final answer
    x = 706,111.17

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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.