Home / 438,556.79-605,218.31-257,399.37

Finding the Fourth Proportional to 438,556.79, 605,218.31 and 257,399.37

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Solution

The fourth proportional to 438,556.79, 605,218.31 and 257,399.37 is: 355,216.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,556.79 : 605,218.31 = 257,399.37 : x
  2. Step 2: Convert to fraction form
    438,556.79/605,218.31 = 257,399.37/x
  3. Step 3: Cross multiply
    438,556.79x = 605,218.31 × 257,399.37
  4. Step 4: Simplify right side
    438,556.79x = 155,782,810,419.47
  5. Step 5: Solve for x
    x = 155,782,810,419.47/438,556.79
  6. Step 6: Final answer
    x = 355,216.97

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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.