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Finding the Fourth Proportional to 339,805.13, 509,389.16 and 115,008.26

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Solution

The fourth proportional to 339,805.13, 509,389.16 and 115,008.26 is: 172,404.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,805.13 : 509,389.16 = 115,008.26 : x
  2. Step 2: Convert to fraction form
    339,805.13/509,389.16 = 115,008.26/x
  3. Step 3: Cross multiply
    339,805.13x = 509,389.16 × 115,008.26
  4. Step 4: Simplify right side
    339,805.13x = 58,583,957,832.47
  5. Step 5: Solve for x
    x = 58,583,957,832.47/339,805.13
  6. Step 6: Final answer
    x = 172,404.57

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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.