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Finding the Fourth Proportional to 399,588.35, 599,422.61 and 115,285.94

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Solution

The fourth proportional to 399,588.35, 599,422.61 and 115,285.94 is: 172,940.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,588.35 : 599,422.61 = 115,285.94 : x
  2. Step 2: Convert to fraction form
    399,588.35/599,422.61 = 115,285.94/x
  3. Step 3: Cross multiply
    399,588.35x = 599,422.61 × 115,285.94
  4. Step 4: Simplify right side
    399,588.35x = 69,104,995,477.56
  5. Step 5: Solve for x
    x = 69,104,995,477.56/399,588.35
  6. Step 6: Final answer
    x = 172,940.47

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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.