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Finding the Fourth Proportional to 388,644.39, 582,911.22 and 122,397.98

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Solution

The fourth proportional to 388,644.39, 582,911.22 and 122,397.98 is: 183,579.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,644.39 : 582,911.22 = 122,397.98 : x
  2. Step 2: Convert to fraction form
    388,644.39/582,911.22 = 122,397.98/x
  3. Step 3: Cross multiply
    388,644.39x = 582,911.22 × 122,397.98
  4. Step 4: Simplify right side
    388,644.39x = 71,347,155,847.34
  5. Step 5: Solve for x
    x = 71,347,155,847.34/388,644.39
  6. Step 6: Final answer
    x = 183,579.53

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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.