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Finding the Fourth Proportional to 339,903.57, 509,396.07 and 129,426.69

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Solution

The fourth proportional to 339,903.57, 509,396.07 and 129,426.69 is: 193,965.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,903.57 : 509,396.07 = 129,426.69 : x
  2. Step 2: Convert to fraction form
    339,903.57/509,396.07 = 129,426.69/x
  3. Step 3: Cross multiply
    339,903.57x = 509,396.07 × 129,426.69
  4. Step 4: Simplify right side
    339,903.57x = 65,929,447,239.11
  5. Step 5: Solve for x
    x = 65,929,447,239.11/339,903.57
  6. Step 6: Final answer
    x = 193,965.15

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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.