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Finding the Fourth Proportional to 386,147.20, 579,321.60 and 149,497.60

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Solution

The fourth proportional to 386,147.20, 579,321.60 and 149,497.60 is: 224,285.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,147.20 : 579,321.60 = 149,497.60 : x
  2. Step 2: Convert to fraction form
    386,147.20/579,321.60 = 149,497.60/x
  3. Step 3: Cross multiply
    386,147.20x = 579,321.60 × 149,497.60
  4. Step 4: Simplify right side
    386,147.20x = 86,607,188,828.16
  5. Step 5: Solve for x
    x = 86,607,188,828.16/386,147.20
  6. Step 6: Final answer
    x = 224,285.42

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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.