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Finding the Fourth Proportional to 339,580.87, 509,388.23 and 129,235.11

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Solution

The fourth proportional to 339,580.87, 509,388.23 and 129,235.11 is: 193,859.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,580.87 : 509,388.23 = 129,235.11 : x
  2. Step 2: Convert to fraction form
    339,580.87/509,388.23 = 129,235.11/x
  3. Step 3: Cross multiply
    339,580.87x = 509,388.23 × 129,235.11
  4. Step 4: Simplify right side
    339,580.87x = 65,830,843,290.58
  5. Step 5: Solve for x
    x = 65,830,843,290.58/339,580.87
  6. Step 6: Final answer
    x = 193,859.10

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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.