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Finding the Fourth Proportional to 418,061.66, 627,105.47 and 198,923.49

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Solution

The fourth proportional to 418,061.66, 627,105.47 and 198,923.49 is: 298,391.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,061.66 : 627,105.47 = 198,923.49 : x
  2. Step 2: Convert to fraction form
    418,061.66/627,105.47 = 198,923.49/x
  3. Step 3: Cross multiply
    418,061.66x = 627,105.47 × 198,923.49
  4. Step 4: Simplify right side
    418,061.66x = 124,746,007,695.87
  5. Step 5: Solve for x
    x = 124,746,007,695.87/418,061.66
  6. Step 6: Final answer
    x = 298,391.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.