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Finding the Fourth Proportional to 2,309.80, 3,188.02 and 1,413.86

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Solution

The fourth proportional to 2,309.80, 3,188.02 and 1,413.86 is: 1,951.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.80 : 3,188.02 = 1,413.86 : x
  2. Step 2: Convert to fraction form
    2,309.80/3,188.02 = 1,413.86/x
  3. Step 3: Cross multiply
    2,309.80x = 3,188.02 × 1,413.86
  4. Step 4: Simplify right side
    2,309.80x = 4,507,413.96
  5. Step 5: Solve for x
    x = 4,507,413.96/2,309.80
  6. Step 6: Final answer
    x = 1,951.43

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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.