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Finding the Fourth Proportional to 339,306.20, 509,167.30 and 139,722.20

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Solution

The fourth proportional to 339,306.20, 509,167.30 and 139,722.20 is: 209,668.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,306.20 : 509,167.30 = 139,722.20 : x
  2. Step 2: Convert to fraction form
    339,306.20/509,167.30 = 139,722.20/x
  3. Step 3: Cross multiply
    339,306.20x = 509,167.30 × 139,722.20
  4. Step 4: Simplify right side
    339,306.20x = 71,141,975,324.06
  5. Step 5: Solve for x
    x = 71,141,975,324.06/339,306.20
  6. Step 6: Final answer
    x = 209,668.95

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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.