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Finding the Fourth Proportional to 388,291.94, 582,578.08 and 135,609.64

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Solution

The fourth proportional to 388,291.94, 582,578.08 and 135,609.64 is: 203,463.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,291.94 : 582,578.08 = 135,609.64 : x
  2. Step 2: Convert to fraction form
    388,291.94/582,578.08 = 135,609.64/x
  3. Step 3: Cross multiply
    388,291.94x = 582,578.08 × 135,609.64
  4. Step 4: Simplify right side
    388,291.94x = 79,003,203,700.69
  5. Step 5: Solve for x
    x = 79,003,203,700.69/388,291.94
  6. Step 6: Final answer
    x = 203,463.41

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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.