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Finding the Fourth Proportional to 667,419.65, 921,036.93 and 361,495.31

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Solution

The fourth proportional to 667,419.65, 921,036.93 and 361,495.31 is: 498,862.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,419.65 : 921,036.93 = 361,495.31 : x
  2. Step 2: Convert to fraction form
    667,419.65/921,036.93 = 361,495.31/x
  3. Step 3: Cross multiply
    667,419.65x = 921,036.93 × 361,495.31
  4. Step 4: Simplify right side
    667,419.65x = 332,950,524,571.01
  5. Step 5: Solve for x
    x = 332,950,524,571.01/667,419.65
  6. Step 6: Final answer
    x = 498,862.34

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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.