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Finding the Fourth Proportional to 867.69, 1,299.11 and 799.65

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Solution

The fourth proportional to 867.69, 1,299.11 and 799.65 is: 1,197.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.69 : 1,299.11 = 799.65 : x
  2. Step 2: Convert to fraction form
    867.69/1,299.11 = 799.65/x
  3. Step 3: Cross multiply
    867.69x = 1,299.11 × 799.65
  4. Step 4: Simplify right side
    867.69x = 1,038,829.31
  5. Step 5: Solve for x
    x = 1,038,829.31/867.69
  6. Step 6: Final answer
    x = 1,197.24

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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.