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Finding the Fourth Proportional to 2,489.72, 3,734.68 and 823.36

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Solution

The fourth proportional to 2,489.72, 3,734.68 and 823.36 is: 1,235.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.72 : 3,734.68 = 823.36 : x
  2. Step 2: Convert to fraction form
    2,489.72/3,734.68 = 823.36/x
  3. Step 3: Cross multiply
    2,489.72x = 3,734.68 × 823.36
  4. Step 4: Simplify right side
    2,489.72x = 3,074,986.12
  5. Step 5: Solve for x
    x = 3,074,986.12/2,489.72
  6. Step 6: Final answer
    x = 1,235.07

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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.