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Finding the Fourth Proportional to 431,327.90, 646,991.85 and 394,003.10

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Solution

The fourth proportional to 431,327.90, 646,991.85 and 394,003.10 is: 591,004.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,327.90 : 646,991.85 = 394,003.10 : x
  2. Step 2: Convert to fraction form
    431,327.90/646,991.85 = 394,003.10/x
  3. Step 3: Cross multiply
    431,327.90x = 646,991.85 × 394,003.10
  4. Step 4: Simplify right side
    431,327.90x = 254,916,794,574.74
  5. Step 5: Solve for x
    x = 254,916,794,574.74/431,327.90
  6. Step 6: Final answer
    x = 591,004.65

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Similar ratio
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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.