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Finding the Fourth Proportional to 339,393.94, 509,088 and 136,986.94

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Solution

The fourth proportional to 339,393.94, 509,088 and 136,986.94 is: 205,479.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,393.94 : 509,088 = 136,986.94 : x
  2. Step 2: Convert to fraction form
    339,393.94/509,088 = 136,986.94/x
  3. Step 3: Cross multiply
    339,393.94x = 509,088 × 136,986.94
  4. Step 4: Simplify right side
    339,393.94x = 69,738,407,310.72
  5. Step 5: Solve for x
    x = 69,738,407,310.72/339,393.94
  6. Step 6: Final answer
    x = 205,479.24

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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.