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Finding the Fourth Proportional to 519,786.93, 718,008.05 and 391,693.67

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Solution

The fourth proportional to 519,786.93, 718,008.05 and 391,693.67 is: 541,066.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,786.93 : 718,008.05 = 391,693.67 : x
  2. Step 2: Convert to fraction form
    519,786.93/718,008.05 = 391,693.67/x
  3. Step 3: Cross multiply
    519,786.93x = 718,008.05 × 391,693.67
  4. Step 4: Simplify right side
    519,786.93x = 281,239,202,645.54
  5. Step 5: Solve for x
    x = 281,239,202,645.54/519,786.93
  6. Step 6: Final answer
    x = 541,066.32

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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.