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Finding the Fourth Proportional to 667,400.07, 921,007.37 and 361,469.40

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Solution

The fourth proportional to 667,400.07, 921,007.37 and 361,469.40 is: 498,825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,400.07 : 921,007.37 = 361,469.40 : x
  2. Step 2: Convert to fraction form
    667,400.07/921,007.37 = 361,469.40/x
  3. Step 3: Cross multiply
    667,400.07x = 921,007.37 × 361,469.40
  4. Step 4: Simplify right side
    667,400.07x = 332,915,979,622.13
  5. Step 5: Solve for x
    x = 332,915,979,622.13/667,400.07
  6. Step 6: Final answer
    x = 498,825.21

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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.