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Finding the Fourth Proportional to 308,138.40, 462,207.60 and 208,605.60

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Solution

The fourth proportional to 308,138.40, 462,207.60 and 208,605.60 is: 312,908.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,138.40 : 462,207.60 = 208,605.60 : x
  2. Step 2: Convert to fraction form
    308,138.40/462,207.60 = 208,605.60/x
  3. Step 3: Cross multiply
    308,138.40x = 462,207.60 × 208,605.60
  4. Step 4: Simplify right side
    308,138.40x = 96,419,093,722.56
  5. Step 5: Solve for x
    x = 96,419,093,722.56/308,138.40
  6. Step 6: Final answer
    x = 312,908.40

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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.