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Finding the Fourth Proportional to 1,297.16, 1,789.56 and 799.64

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Solution

The fourth proportional to 1,297.16, 1,789.56 and 799.64 is: 1,103.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.16 : 1,789.56 = 799.64 : x
  2. Step 2: Convert to fraction form
    1,297.16/1,789.56 = 799.64/x
  3. Step 3: Cross multiply
    1,297.16x = 1,789.56 × 799.64
  4. Step 4: Simplify right side
    1,297.16x = 1,431,003.76
  5. Step 5: Solve for x
    x = 1,431,003.76/1,297.16
  6. Step 6: Final answer
    x = 1,103.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.