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Finding the Fourth Proportional to 339,310.94, 508,966.07 and 86,591.43

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Solution

The fourth proportional to 339,310.94, 508,966.07 and 86,591.43 is: 129,887.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,310.94 : 508,966.07 = 86,591.43 : x
  2. Step 2: Convert to fraction form
    339,310.94/508,966.07 = 86,591.43/x
  3. Step 3: Cross multiply
    339,310.94x = 508,966.07 × 86,591.43
  4. Step 4: Simplify right side
    339,310.94x = 44,072,099,389.82
  5. Step 5: Solve for x
    x = 44,072,099,389.82/339,310.94
  6. Step 6: Final answer
    x = 129,887.06

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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.