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Finding the Fourth Proportional to 388,388.36, 582,586.38 and 122,142.92

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Solution

The fourth proportional to 388,388.36, 582,586.38 and 122,142.92 is: 183,215.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,388.36 : 582,586.38 = 122,142.92 : x
  2. Step 2: Convert to fraction form
    388,388.36/582,586.38 = 122,142.92/x
  3. Step 3: Cross multiply
    388,388.36x = 582,586.38 × 122,142.92
  4. Step 4: Simplify right side
    388,388.36x = 71,158,801,605.43
  5. Step 5: Solve for x
    x = 71,158,801,605.43/388,388.36
  6. Step 6: Final answer
    x = 183,215.59

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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.