Home / 664,619.46-917,090.82-378,144.33

Finding the Fourth Proportional to 664,619.46, 917,090.82 and 378,144.33

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Solution

The fourth proportional to 664,619.46, 917,090.82 and 378,144.33 is: 521,791.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,619.46 : 917,090.82 = 378,144.33 : x
  2. Step 2: Convert to fraction form
    664,619.46/917,090.82 = 378,144.33/x
  3. Step 3: Cross multiply
    664,619.46x = 917,090.82 × 378,144.33
  4. Step 4: Simplify right side
    664,619.46x = 346,792,693,678.05
  5. Step 5: Solve for x
    x = 346,792,693,678.05/664,619.46
  6. Step 6: Final answer
    x = 521,791.36

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1.5x scale

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.