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Finding the Fourth Proportional to 779.18, 1,168.76 and 231.37

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Solution

The fourth proportional to 779.18, 1,168.76 and 231.37 is: 347.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.18 : 1,168.76 = 231.37 : x
  2. Step 2: Convert to fraction form
    779.18/1,168.76 = 231.37/x
  3. Step 3: Cross multiply
    779.18x = 1,168.76 × 231.37
  4. Step 4: Simplify right side
    779.18x = 270,413.66
  5. Step 5: Solve for x
    x = 270,413.66/779.18
  6. Step 6: Final answer
    x = 347.05

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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.