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Finding the Fourth Proportional to 405,028.40, 558,843.72 and 235,161.68

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Solution

The fourth proportional to 405,028.40, 558,843.72 and 235,161.68 is: 324,467.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,028.40 : 558,843.72 = 235,161.68 : x
  2. Step 2: Convert to fraction form
    405,028.40/558,843.72 = 235,161.68/x
  3. Step 3: Cross multiply
    405,028.40x = 558,843.72 × 235,161.68
  4. Step 4: Simplify right side
    405,028.40x = 131,418,628,052.65
  5. Step 5: Solve for x
    x = 131,418,628,052.65/405,028.40
  6. Step 6: Final answer
    x = 324,467.69

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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.