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Finding the Fourth Proportional to 869.11, 1,196.71 and 799.45

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Solution

The fourth proportional to 869.11, 1,196.71 and 799.45 is: 1,100.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.11 : 1,196.71 = 799.45 : x
  2. Step 2: Convert to fraction form
    869.11/1,196.71 = 799.45/x
  3. Step 3: Cross multiply
    869.11x = 1,196.71 × 799.45
  4. Step 4: Simplify right side
    869.11x = 956,709.81
  5. Step 5: Solve for x
    x = 956,709.81/869.11
  6. Step 6: Final answer
    x = 1,100.79

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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.