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Finding the Fourth Proportional to 386,978.31, 580,318.02 and 150,289.02

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Solution

The fourth proportional to 386,978.31, 580,318.02 and 150,289.02 is: 225,375.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,978.31 : 580,318.02 = 150,289.02 : x
  2. Step 2: Convert to fraction form
    386,978.31/580,318.02 = 150,289.02/x
  3. Step 3: Cross multiply
    386,978.31x = 580,318.02 × 150,289.02
  4. Step 4: Simplify right side
    386,978.31x = 87,215,426,514.14
  5. Step 5: Solve for x
    x = 87,215,426,514.14/386,978.31
  6. Step 6: Final answer
    x = 225,375.49

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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.