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Finding the Fourth Proportional to 2,679.93, 4,009.82 and 1,859.79

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Solution

The fourth proportional to 2,679.93, 4,009.82 and 1,859.79 is: 2,782.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.93 : 4,009.82 = 1,859.79 : x
  2. Step 2: Convert to fraction form
    2,679.93/4,009.82 = 1,859.79/x
  3. Step 3: Cross multiply
    2,679.93x = 4,009.82 × 1,859.79
  4. Step 4: Simplify right side
    2,679.93x = 7,457,413.84
  5. Step 5: Solve for x
    x = 7,457,413.84/2,679.93
  6. Step 6: Final answer
    x = 2,782.69

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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.