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Finding the Fourth Proportional to 388,241.50, 582,502.37 and 135,559.21

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Solution

The fourth proportional to 388,241.50, 582,502.37 and 135,559.21 is: 203,387.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,241.50 : 582,502.37 = 135,559.21 : x
  2. Step 2: Convert to fraction form
    388,241.50/582,502.37 = 135,559.21/x
  3. Step 3: Cross multiply
    388,241.50x = 582,502.37 × 135,559.21
  4. Step 4: Simplify right side
    388,241.50x = 78,963,561,100.33
  5. Step 5: Solve for x
    x = 78,963,561,100.33/388,241.50
  6. Step 6: Final answer
    x = 203,387.74

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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.