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Finding the Fourth Proportional to 339,939.20, 509,908.80 and 162,792.20

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Solution

The fourth proportional to 339,939.20, 509,908.80 and 162,792.20 is: 244,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,939.20 : 509,908.80 = 162,792.20 : x
  2. Step 2: Convert to fraction form
    339,939.20/509,908.80 = 162,792.20/x
  3. Step 3: Cross multiply
    339,939.20x = 509,908.80 × 162,792.20
  4. Step 4: Simplify right side
    339,939.20x = 83,009,175,351.36
  5. Step 5: Solve for x
    x = 83,009,175,351.36/339,939.20
  6. Step 6: Final answer
    x = 244,188.30

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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.