Home / 2,587.41-3,878.78-942.80

Finding the Fourth Proportional to 2,587.41, 3,878.78 and 942.80

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Solution

The fourth proportional to 2,587.41, 3,878.78 and 942.80 is: 1,413.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.41 : 3,878.78 = 942.80 : x
  2. Step 2: Convert to fraction form
    2,587.41/3,878.78 = 942.80/x
  3. Step 3: Cross multiply
    2,587.41x = 3,878.78 × 942.80
  4. Step 4: Simplify right side
    2,587.41x = 3,656,889.68
  5. Step 5: Solve for x
    x = 3,656,889.68/2,587.41
  6. Step 6: Final answer
    x = 1,413.34

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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.