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Finding the Fourth Proportional to 2,965.81, 4,448.21 and 991.26

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Solution

The fourth proportional to 2,965.81, 4,448.21 and 991.26 is: 1,486.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,965.81 : 4,448.21 = 991.26 : x
  2. Step 2: Convert to fraction form
    2,965.81/4,448.21 = 991.26/x
  3. Step 3: Cross multiply
    2,965.81x = 4,448.21 × 991.26
  4. Step 4: Simplify right side
    2,965.81x = 4,409,305.45
  5. Step 5: Solve for x
    x = 4,409,305.45/2,965.81
  6. Step 6: Final answer
    x = 1,486.71

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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.