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Finding the Fourth Proportional to 4,991.72, 7,479.37 and 3,958.36

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Solution

The fourth proportional to 4,991.72, 7,479.37 and 3,958.36 is: 5,931.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.72 : 7,479.37 = 3,958.36 : x
  2. Step 2: Convert to fraction form
    4,991.72/7,479.37 = 3,958.36/x
  3. Step 3: Cross multiply
    4,991.72x = 7,479.37 × 3,958.36
  4. Step 4: Simplify right side
    4,991.72x = 29,606,039.03
  5. Step 5: Solve for x
    x = 29,606,039.03/4,991.72
  6. Step 6: Final answer
    x = 5,931.03

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1.5x scale

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.