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Finding the Fourth Proportional to 605,092.70, 907,639.05 and 521,111.90

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Solution

The fourth proportional to 605,092.70, 907,639.05 and 521,111.90 is: 781,667.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,092.70 : 907,639.05 = 521,111.90 : x
  2. Step 2: Convert to fraction form
    605,092.70/907,639.05 = 521,111.90/x
  3. Step 3: Cross multiply
    605,092.70x = 907,639.05 × 521,111.90
  4. Step 4: Simplify right side
    605,092.70x = 472,981,509,859.70
  5. Step 5: Solve for x
    x = 472,981,509,859.70/605,092.70
  6. Step 6: Final answer
    x = 781,667.85

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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.