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Finding the Fourth Proportional to 339,903.62, 509,396.13 and 129,426.74

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Solution

The fourth proportional to 339,903.62, 509,396.13 and 129,426.74 is: 193,965.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,903.62 : 509,396.13 = 129,426.74 : x
  2. Step 2: Convert to fraction form
    339,903.62/509,396.13 = 129,426.74/x
  3. Step 3: Cross multiply
    339,903.62x = 509,396.13 × 129,426.74
  4. Step 4: Simplify right side
    339,903.62x = 65,929,477,927.54
  5. Step 5: Solve for x
    x = 65,929,477,927.54/339,903.62
  6. Step 6: Final answer
    x = 193,965.22

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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.