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Finding the Fourth Proportional to 386,978.99, 580,242.93 and 150,044.87

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Solution

The fourth proportional to 386,978.99, 580,242.93 and 150,044.87 is: 224,979.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,978.99 : 580,242.93 = 150,044.87 : x
  2. Step 2: Convert to fraction form
    386,978.99/580,242.93 = 150,044.87/x
  3. Step 3: Cross multiply
    386,978.99x = 580,242.93 × 150,044.87
  4. Step 4: Simplify right side
    386,978.99x = 87,062,472,099.05
  5. Step 5: Solve for x
    x = 87,062,472,099.05/386,978.99
  6. Step 6: Final answer
    x = 224,979.85

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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.