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Finding the Fourth Proportional to 339,432.75, 509,214.69 and 129,054.33

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Solution

The fourth proportional to 339,432.75, 509,214.69 and 129,054.33 is: 193,606.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,432.75 : 509,214.69 = 129,054.33 : x
  2. Step 2: Convert to fraction form
    339,432.75/509,214.69 = 129,054.33/x
  3. Step 3: Cross multiply
    339,432.75x = 509,214.69 × 129,054.33
  4. Step 4: Simplify right side
    339,432.75x = 65,716,360,644.11
  5. Step 5: Solve for x
    x = 65,716,360,644.11/339,432.75
  6. Step 6: Final answer
    x = 193,606.42

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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.