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Finding the Fourth Proportional to 388,236.93, 582,495.51 and 135,554.64

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Solution

The fourth proportional to 388,236.93, 582,495.51 and 135,554.64 is: 203,380.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,236.93 : 582,495.51 = 135,554.64 : x
  2. Step 2: Convert to fraction form
    388,236.93/582,495.51 = 135,554.64/x
  3. Step 3: Cross multiply
    388,236.93x = 582,495.51 × 135,554.64
  4. Step 4: Simplify right side
    388,236.93x = 78,959,969,159.67
  5. Step 5: Solve for x
    x = 78,959,969,159.67/388,236.93
  6. Step 6: Final answer
    x = 203,380.88

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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.