Home / 678,021.51-1,016,638.47-257,067.75

Finding the Fourth Proportional to 678,021.51, 1,016,638.47 and 257,067.75

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Solution

The fourth proportional to 678,021.51, 1,016,638.47 and 257,067.75 is: 385,452.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,021.51 : 1,016,638.47 = 257,067.75 : x
  2. Step 2: Convert to fraction form
    678,021.51/1,016,638.47 = 257,067.75/x
  3. Step 3: Cross multiply
    678,021.51x = 1,016,638.47 × 257,067.75
  4. Step 4: Simplify right side
    678,021.51x = 261,344,964,046.34
  5. Step 5: Solve for x
    x = 261,344,964,046.34/678,021.51
  6. Step 6: Final answer
    x = 385,452.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.