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Finding the Fourth Proportional to 418,709.16, 577,632.11 and 279,039.11

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Solution

The fourth proportional to 418,709.16, 577,632.11 and 279,039.11 is: 384,949.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,709.16 : 577,632.11 = 279,039.11 : x
  2. Step 2: Convert to fraction form
    418,709.16/577,632.11 = 279,039.11/x
  3. Step 3: Cross multiply
    418,709.16x = 577,632.11 × 279,039.11
  4. Step 4: Simplify right side
    418,709.16x = 161,181,945,598.47
  5. Step 5: Solve for x
    x = 161,181,945,598.47/418,709.16
  6. Step 6: Final answer
    x = 384,949.65

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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.