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Finding the Fourth Proportional to 404,365,781.80, 606,548,672.70 and 388,493,410.60

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Solution

The fourth proportional to 404,365,781.80, 606,548,672.70 and 388,493,410.60 is: 582,740,115.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,365,781.80 : 606,548,672.70 = 388,493,410.60 : x
  2. Step 2: Convert to fraction form
    404,365,781.80/606,548,672.70 = 388,493,410.60/x
  3. Step 3: Cross multiply
    404,365,781.80x = 606,548,672.70 × 388,493,410.60
  4. Step 4: Simplify right side
    404,365,781.80x = 235,640,162,552,126,144
  5. Step 5: Solve for x
    x = 235,640,162,552,126,144/404,365,781.80
  6. Step 6: Final answer
    x = 582,740,115.90

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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.