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Finding the Fourth Proportional to 388,244.07, 582,506.22 and 135,561.78

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Solution

The fourth proportional to 388,244.07, 582,506.22 and 135,561.78 is: 203,391.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,244.07 : 582,506.22 = 135,561.78 : x
  2. Step 2: Convert to fraction form
    388,244.07/582,506.22 = 135,561.78/x
  3. Step 3: Cross multiply
    388,244.07x = 582,506.22 × 135,561.78
  4. Step 4: Simplify right side
    388,244.07x = 78,965,580,044.27
  5. Step 5: Solve for x
    x = 78,965,580,044.27/388,244.07
  6. Step 6: Final answer
    x = 203,391.59

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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.