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Finding the Fourth Proportional to 2,723.28, 4,085.04 and 991.68

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Solution

The fourth proportional to 2,723.28, 4,085.04 and 991.68 is: 1,487.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,723.28 : 4,085.04 = 991.68 : x
  2. Step 2: Convert to fraction form
    2,723.28/4,085.04 = 991.68/x
  3. Step 3: Cross multiply
    2,723.28x = 4,085.04 × 991.68
  4. Step 4: Simplify right side
    2,723.28x = 4,051,052.47
  5. Step 5: Solve for x
    x = 4,051,052.47/2,723.28
  6. Step 6: Final answer
    x = 1,487.56

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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.