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Finding the Fourth Proportional to 685,321.04, 945,842 and 394,876.97

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Solution

The fourth proportional to 685,321.04, 945,842 and 394,876.97 is: 544,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,321.04 : 945,842 = 394,876.97 : x
  2. Step 2: Convert to fraction form
    685,321.04/945,842 = 394,876.97/x
  3. Step 3: Cross multiply
    685,321.04x = 945,842 × 394,876.97
  4. Step 4: Simplify right side
    685,321.04x = 373,491,223,058.74
  5. Step 5: Solve for x
    x = 373,491,223,058.74/685,321.04
  6. Step 6: Final answer
    x = 544,987.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.