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Finding the Fourth Proportional to 339,578.28, 509,361.17 and 137,169.29

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Solution

The fourth proportional to 339,578.28, 509,361.17 and 137,169.29 is: 205,751.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,578.28 : 509,361.17 = 137,169.29 : x
  2. Step 2: Convert to fraction form
    339,578.28/509,361.17 = 137,169.29/x
  3. Step 3: Cross multiply
    339,578.28x = 509,361.17 × 137,169.29
  4. Step 4: Simplify right side
    339,578.28x = 69,868,710,630.03
  5. Step 5: Solve for x
    x = 69,868,710,630.03/339,578.28
  6. Step 6: Final answer
    x = 205,751.41

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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.