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Finding the Fourth Proportional to 339,331.20, 509,204.80 and 139,747.20

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Solution

The fourth proportional to 339,331.20, 509,204.80 and 139,747.20 is: 209,706.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,331.20 : 509,204.80 = 139,747.20 : x
  2. Step 2: Convert to fraction form
    339,331.20/509,204.80 = 139,747.20/x
  3. Step 3: Cross multiply
    339,331.20x = 509,204.80 × 139,747.20
  4. Step 4: Simplify right side
    339,331.20x = 71,159,945,026.56
  5. Step 5: Solve for x
    x = 71,159,945,026.56/339,331.20
  6. Step 6: Final answer
    x = 209,706.46

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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.