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Finding the Fourth Proportional to 388,963.74, 582,505.05 and 321,910.26

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Solution

The fourth proportional to 388,963.74, 582,505.05 and 321,910.26 is: 482,086.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,963.74 : 582,505.05 = 321,910.26 : x
  2. Step 2: Convert to fraction form
    388,963.74/582,505.05 = 321,910.26/x
  3. Step 3: Cross multiply
    388,963.74x = 582,505.05 × 321,910.26
  4. Step 4: Simplify right side
    388,963.74x = 187,514,352,096.81
  5. Step 5: Solve for x
    x = 187,514,352,096.81/388,963.74
  6. Step 6: Final answer
    x = 482,086.97

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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.