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Finding the Fourth Proportional to 2,661.18, 3,991.76 and 713.33

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Solution

The fourth proportional to 2,661.18, 3,991.76 and 713.33 is: 1,069.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.18 : 3,991.76 = 713.33 : x
  2. Step 2: Convert to fraction form
    2,661.18/3,991.76 = 713.33/x
  3. Step 3: Cross multiply
    2,661.18x = 3,991.76 × 713.33
  4. Step 4: Simplify right side
    2,661.18x = 2,847,418.64
  5. Step 5: Solve for x
    x = 2,847,418.64/2,661.18
  6. Step 6: Final answer
    x = 1,069.98

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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.