Home / 861,020.78-1,291,083.66-253,729.44

Finding the Fourth Proportional to 861,020.78, 1,291,083.66 and 253,729.44

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Solution

The fourth proportional to 861,020.78, 1,291,083.66 and 253,729.44 is: 380,462.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,020.78 : 1,291,083.66 = 253,729.44 : x
  2. Step 2: Convert to fraction form
    861,020.78/1,291,083.66 = 253,729.44/x
  3. Step 3: Cross multiply
    861,020.78x = 1,291,083.66 × 253,729.44
  4. Step 4: Simplify right side
    861,020.78x = 327,585,934,044.95
  5. Step 5: Solve for x
    x = 327,585,934,044.95/861,020.78
  6. Step 6: Final answer
    x = 380,462.29

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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.