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Finding the Fourth Proportional to 1,513.25, 2,268.81 and 773.09

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Solution

The fourth proportional to 1,513.25, 2,268.81 and 773.09 is: 1,159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.25 : 2,268.81 = 773.09 : x
  2. Step 2: Convert to fraction form
    1,513.25/2,268.81 = 773.09/x
  3. Step 3: Cross multiply
    1,513.25x = 2,268.81 × 773.09
  4. Step 4: Simplify right side
    1,513.25x = 1,753,982.98
  5. Step 5: Solve for x
    x = 1,753,982.98/1,513.25
  6. Step 6: Final answer
    x = 1,159.09

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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.