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Finding the Fourth Proportional to 618,805.90, 853,960.89 and 377,098.66

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Solution

The fourth proportional to 618,805.90, 853,960.89 and 377,098.66 is: 520,401.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,805.90 : 853,960.89 = 377,098.66 : x
  2. Step 2: Convert to fraction form
    618,805.90/853,960.89 = 377,098.66/x
  3. Step 3: Cross multiply
    618,805.90x = 853,960.89 × 377,098.66
  4. Step 4: Simplify right side
    618,805.90x = 322,027,507,311.41
  5. Step 5: Solve for x
    x = 322,027,507,311.41/618,805.90
  6. Step 6: Final answer
    x = 520,401.48

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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.