Home / 642,239.88-886,291.03-355,778.52

Finding the Fourth Proportional to 642,239.88, 886,291.03 and 355,778.52

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Solution

The fourth proportional to 642,239.88, 886,291.03 and 355,778.52 is: 490,974.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,239.88 : 886,291.03 = 355,778.52 : x
  2. Step 2: Convert to fraction form
    642,239.88/886,291.03 = 355,778.52/x
  3. Step 3: Cross multiply
    642,239.88x = 886,291.03 × 355,778.52
  4. Step 4: Simplify right side
    642,239.88x = 315,323,310,942.68
  5. Step 5: Solve for x
    x = 315,323,310,942.68/642,239.88
  6. Step 6: Final answer
    x = 490,974.36

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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.