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Finding the Fourth Proportional to 911,190.60, 1,366,785.90 and 405,750.60

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Solution

The fourth proportional to 911,190.60, 1,366,785.90 and 405,750.60 is: 608,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,190.60 : 1,366,785.90 = 405,750.60 : x
  2. Step 2: Convert to fraction form
    911,190.60/1,366,785.90 = 405,750.60/x
  3. Step 3: Cross multiply
    911,190.60x = 1,366,785.90 × 405,750.60
  4. Step 4: Simplify right side
    911,190.60x = 554,574,198,996.54
  5. Step 5: Solve for x
    x = 554,574,198,996.54/911,190.60
  6. Step 6: Final answer
    x = 608,625.90

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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.