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Finding the Fourth Proportional to 665,854.40, 998,911.20 and 192,555.20

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Solution

The fourth proportional to 665,854.40, 998,911.20 and 192,555.20 is: 288,870.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,854.40 : 998,911.20 = 192,555.20 : x
  2. Step 2: Convert to fraction form
    665,854.40/998,911.20 = 192,555.20/x
  3. Step 3: Cross multiply
    665,854.40x = 998,911.20 × 192,555.20
  4. Step 4: Simplify right side
    665,854.40x = 192,345,545,898.24
  5. Step 5: Solve for x
    x = 192,345,545,898.24/665,854.40
  6. Step 6: Final answer
    x = 288,870.28

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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.