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Finding the Fourth Proportional to 5,716.72, 7,887.78 and 3,619.64

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Solution

The fourth proportional to 5,716.72, 7,887.78 and 3,619.64 is: 4,994.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,716.72 : 7,887.78 = 3,619.64 : x
  2. Step 2: Convert to fraction form
    5,716.72/7,887.78 = 3,619.64/x
  3. Step 3: Cross multiply
    5,716.72x = 7,887.78 × 3,619.64
  4. Step 4: Simplify right side
    5,716.72x = 28,550,924.00
  5. Step 5: Solve for x
    x = 28,550,924.00/5,716.72
  6. Step 6: Final answer
    x = 4,994.28

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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.