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Finding the Fourth Proportional to 388,236.88, 582,380.43 and 122,008.51

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Solution

The fourth proportional to 388,236.88, 582,380.43 and 122,008.51 is: 183,020.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,236.88 : 582,380.43 = 122,008.51 : x
  2. Step 2: Convert to fraction form
    388,236.88/582,380.43 = 122,008.51/x
  3. Step 3: Cross multiply
    388,236.88x = 582,380.43 × 122,008.51
  4. Step 4: Simplify right side
    388,236.88x = 71,055,368,517.46
  5. Step 5: Solve for x
    x = 71,055,368,517.46/388,236.88
  6. Step 6: Final answer
    x = 183,020.66

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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.