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Finding the Fourth Proportional to 606,910.70, 911,350.20 and 408,112.40

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Solution

The fourth proportional to 606,910.70, 911,350.20 and 408,112.40 is: 612,830.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,910.70 : 911,350.20 = 408,112.40 : x
  2. Step 2: Convert to fraction form
    606,910.70/911,350.20 = 408,112.40/x
  3. Step 3: Cross multiply
    606,910.70x = 911,350.20 × 408,112.40
  4. Step 4: Simplify right side
    606,910.70x = 371,933,317,362.48
  5. Step 5: Solve for x
    x = 371,933,317,362.48/606,910.70
  6. Step 6: Final answer
    x = 612,830.38

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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.