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Finding the Fourth Proportional to 393,712.69, 590,662.89 and 127,473.28

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Solution

The fourth proportional to 393,712.69, 590,662.89 and 127,473.28 is: 191,240.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,712.69 : 590,662.89 = 127,473.28 : x
  2. Step 2: Convert to fraction form
    393,712.69/590,662.89 = 127,473.28/x
  3. Step 3: Cross multiply
    393,712.69x = 590,662.89 × 127,473.28
  4. Step 4: Simplify right side
    393,712.69x = 75,293,737,757.92
  5. Step 5: Solve for x
    x = 75,293,737,757.92/393,712.69
  6. Step 6: Final answer
    x = 191,240.31

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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.