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Finding the Fourth Proportional to 660,616.22, 990,645.46 and 205,151.60

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Solution

The fourth proportional to 660,616.22, 990,645.46 and 205,151.60 is: 307,640.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,616.22 : 990,645.46 = 205,151.60 : x
  2. Step 2: Convert to fraction form
    660,616.22/990,645.46 = 205,151.60/x
  3. Step 3: Cross multiply
    660,616.22x = 990,645.46 × 205,151.60
  4. Step 4: Simplify right side
    660,616.22x = 203,232,503,115.47
  5. Step 5: Solve for x
    x = 203,232,503,115.47/660,616.22
  6. Step 6: Final answer
    x = 307,640.80

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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.