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Finding the Fourth Proportional to 2,288.91, 3,433.37 and 991.29

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Solution

The fourth proportional to 2,288.91, 3,433.37 and 991.29 is: 1,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,288.91 : 3,433.37 = 991.29 : x
  2. Step 2: Convert to fraction form
    2,288.91/3,433.37 = 991.29/x
  3. Step 3: Cross multiply
    2,288.91x = 3,433.37 × 991.29
  4. Step 4: Simplify right side
    2,288.91x = 3,403,460.39
  5. Step 5: Solve for x
    x = 3,403,460.39/2,288.91
  6. Step 6: Final answer
    x = 1,486.94

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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.