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Finding the Fourth Proportional to 339,799.30, 509,696.65 and 115,317.77

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Solution

The fourth proportional to 339,799.30, 509,696.65 and 115,317.77 is: 172,975.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,799.30 : 509,696.65 = 115,317.77 : x
  2. Step 2: Convert to fraction form
    339,799.30/509,696.65 = 115,317.77/x
  3. Step 3: Cross multiply
    339,799.30x = 509,696.65 × 115,317.77
  4. Step 4: Simplify right side
    339,799.30x = 58,777,081,054.47
  5. Step 5: Solve for x
    x = 58,777,081,054.47/339,799.30
  6. Step 6: Final answer
    x = 172,975.87

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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.