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Finding the Fourth Proportional to 394,662.72, 591,928.08 and 141,891.68

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Solution

The fourth proportional to 394,662.72, 591,928.08 and 141,891.68 is: 212,813.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,662.72 : 591,928.08 = 141,891.68 : x
  2. Step 2: Convert to fraction form
    394,662.72/591,928.08 = 141,891.68/x
  3. Step 3: Cross multiply
    394,662.72x = 591,928.08 × 141,891.68
  4. Step 4: Simplify right side
    394,662.72x = 83,989,669,710.37
  5. Step 5: Solve for x
    x = 83,989,669,710.37/394,662.72
  6. Step 6: Final answer
    x = 212,813.79

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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.