Home / 664,620.46-917,092.20-378,145.33

Finding the Fourth Proportional to 664,620.46, 917,092.20 and 378,145.33

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Solution

The fourth proportional to 664,620.46, 917,092.20 and 378,145.33 is: 521,792.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,620.46 : 917,092.20 = 378,145.33 : x
  2. Step 2: Convert to fraction form
    664,620.46/917,092.20 = 378,145.33/x
  3. Step 3: Cross multiply
    664,620.46x = 917,092.20 × 378,145.33
  4. Step 4: Simplify right side
    664,620.46x = 346,794,132,609.43
  5. Step 5: Solve for x
    x = 346,794,132,609.43/664,620.46
  6. Step 6: Final answer
    x = 521,792.74

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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.