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Finding the Fourth Proportional to 408,412.22, 612,537.57 and 388,158.71

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Solution

The fourth proportional to 408,412.22, 612,537.57 and 388,158.71 is: 582,161.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,412.22 : 612,537.57 = 388,158.71 : x
  2. Step 2: Convert to fraction form
    408,412.22/612,537.57 = 388,158.71/x
  3. Step 3: Cross multiply
    408,412.22x = 612,537.57 × 388,158.71
  4. Step 4: Simplify right side
    408,412.22x = 237,761,789,935.05
  5. Step 5: Solve for x
    x = 237,761,789,935.05/408,412.22
  6. Step 6: Final answer
    x = 582,161.31

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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.