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Finding the Fourth Proportional to 605,748.80, 907,639.05 and 521,111.90

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Solution

The fourth proportional to 605,748.80, 907,639.05 and 521,111.90 is: 780,821.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,748.80 : 907,639.05 = 521,111.90 : x
  2. Step 2: Convert to fraction form
    605,748.80/907,639.05 = 521,111.90/x
  3. Step 3: Cross multiply
    605,748.80x = 907,639.05 × 521,111.90
  4. Step 4: Simplify right side
    605,748.80x = 472,981,509,859.70
  5. Step 5: Solve for x
    x = 472,981,509,859.70/605,748.80
  6. Step 6: Final answer
    x = 780,821.21

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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.