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Finding the Fourth Proportional to 339,674.40, 509,516.40 and 129,323.84

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Solution

The fourth proportional to 339,674.40, 509,516.40 and 129,323.84 is: 193,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,674.40 : 509,516.40 = 129,323.84 : x
  2. Step 2: Convert to fraction form
    339,674.40/509,516.40 = 129,323.84/x
  3. Step 3: Cross multiply
    339,674.40x = 509,516.40 × 129,323.84
  4. Step 4: Simplify right side
    339,674.40x = 65,892,617,390.98
  5. Step 5: Solve for x
    x = 65,892,617,390.98/339,674.40
  6. Step 6: Final answer
    x = 193,987.59

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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.