Home / 987,137.82-1,361,557.35-681,336.90

Finding the Fourth Proportional to 987,137.82, 1,361,557.35 and 681,336.90

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Solution

The fourth proportional to 987,137.82, 1,361,557.35 and 681,336.90 is: 939,766.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,137.82 : 1,361,557.35 = 681,336.90 : x
  2. Step 2: Convert to fraction form
    987,137.82/1,361,557.35 = 681,336.90/x
  3. Step 3: Cross multiply
    987,137.82x = 1,361,557.35 × 681,336.90
  4. Step 4: Simplify right side
    987,137.82x = 927,679,264,021.22
  5. Step 5: Solve for x
    x = 927,679,264,021.22/987,137.82
  6. Step 6: Final answer
    x = 939,766.71

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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.