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Finding the Fourth Proportional to 388,512.67, 582,842.82 and 135,864.97

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Solution

The fourth proportional to 388,512.67, 582,842.82 and 135,864.97 is: 203,823.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,512.67 : 582,842.82 = 135,864.97 : x
  2. Step 2: Convert to fraction form
    388,512.67/582,842.82 = 135,864.97/x
  3. Step 3: Cross multiply
    388,512.67x = 582,842.82 × 135,864.97
  4. Step 4: Simplify right side
    388,512.67x = 79,187,922,254.02
  5. Step 5: Solve for x
    x = 79,187,922,254.02/388,512.67
  6. Step 6: Final answer
    x = 203,823.27

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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.