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Finding the Fourth Proportional to 667,495.36, 921,148.01 and 361,571.73

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Solution

The fourth proportional to 667,495.36, 921,148.01 and 361,571.73 is: 498,971.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,495.36 : 921,148.01 = 361,571.73 : x
  2. Step 2: Convert to fraction form
    667,495.36/921,148.01 = 361,571.73/x
  3. Step 3: Cross multiply
    667,495.36x = 921,148.01 × 361,571.73
  4. Step 4: Simplify right side
    667,495.36x = 333,061,084,597.94
  5. Step 5: Solve for x
    x = 333,061,084,597.94/667,495.36
  6. Step 6: Final answer
    x = 498,971.39

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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.