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Finding the Fourth Proportional to 388,241.12, 582,501.81 and 135,558.84

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Solution

The fourth proportional to 388,241.12, 582,501.81 and 135,558.84 is: 203,387.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,241.12 : 582,501.81 = 135,558.84 : x
  2. Step 2: Convert to fraction form
    388,241.12/582,501.81 = 135,558.84/x
  3. Step 3: Cross multiply
    388,241.12x = 582,501.81 × 135,558.84
  4. Step 4: Simplify right side
    388,241.12x = 78,963,266,410.09
  5. Step 5: Solve for x
    x = 78,963,266,410.09/388,241.12
  6. Step 6: Final answer
    x = 203,387.18

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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.