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Finding the Fourth Proportional to 393,727.38, 590,684.94 and 127,488

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Solution

The fourth proportional to 393,727.38, 590,684.94 and 127,488 is: 191,262.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,727.38 : 590,684.94 = 127,488 : x
  2. Step 2: Convert to fraction form
    393,727.38/590,684.94 = 127,488/x
  3. Step 3: Cross multiply
    393,727.38x = 590,684.94 × 127,488
  4. Step 4: Simplify right side
    393,727.38x = 75,305,241,630.72
  5. Step 5: Solve for x
    x = 75,305,241,630.72/393,727.38
  6. Step 6: Final answer
    x = 191,262.39

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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.