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Finding the Fourth Proportional to 388,067.66, 582,104.07 and 135,347.20

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Solution

The fourth proportional to 388,067.66, 582,104.07 and 135,347.20 is: 203,021.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,067.66 : 582,104.07 = 135,347.20 : x
  2. Step 2: Convert to fraction form
    388,067.66/582,104.07 = 135,347.20/x
  3. Step 3: Cross multiply
    388,067.66x = 582,104.07 × 135,347.20
  4. Step 4: Simplify right side
    388,067.66x = 78,786,157,802.18
  5. Step 5: Solve for x
    x = 78,786,157,802.18/388,067.66
  6. Step 6: Final answer
    x = 203,021.71

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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.