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Finding the Fourth Proportional to 2,288.74, 3,431.91 and 728.26

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Solution

The fourth proportional to 2,288.74, 3,431.91 and 728.26 is: 1,092.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,288.74 : 3,431.91 = 728.26 : x
  2. Step 2: Convert to fraction form
    2,288.74/3,431.91 = 728.26/x
  3. Step 3: Cross multiply
    2,288.74x = 3,431.91 × 728.26
  4. Step 4: Simplify right side
    2,288.74x = 2,499,322.78
  5. Step 5: Solve for x
    x = 2,499,322.78/2,288.74
  6. Step 6: Final answer
    x = 1,092.01

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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.