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Finding the Fourth Proportional to 388,069.45, 582,201.05 and 135,353.57

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Solution

The fourth proportional to 388,069.45, 582,201.05 and 135,353.57 is: 203,064.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,069.45 : 582,201.05 = 135,353.57 : x
  2. Step 2: Convert to fraction form
    388,069.45/582,201.05 = 135,353.57/x
  3. Step 3: Cross multiply
    388,069.45x = 582,201.05 × 135,353.57
  4. Step 4: Simplify right side
    388,069.45x = 78,802,988,691.41
  5. Step 5: Solve for x
    x = 78,802,988,691.41/388,069.45
  6. Step 6: Final answer
    x = 203,064.14

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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.