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Finding the Fourth Proportional to 399,367.52, 599,039.76 and 103,879.52

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Solution

The fourth proportional to 399,367.52, 599,039.76 and 103,879.52 is: 155,816.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,367.52 : 599,039.76 = 103,879.52 : x
  2. Step 2: Convert to fraction form
    399,367.52/599,039.76 = 103,879.52/x
  3. Step 3: Cross multiply
    399,367.52x = 599,039.76 × 103,879.52
  4. Step 4: Simplify right side
    399,367.52x = 62,227,962,729.72
  5. Step 5: Solve for x
    x = 62,227,962,729.72/399,367.52
  6. Step 6: Final answer
    x = 155,816.28

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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.