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Finding the Fourth Proportional to 789.68, 1,184.68 and 269.64

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Solution

The fourth proportional to 789.68, 1,184.68 and 269.64 is: 404.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.68 : 1,184.68 = 269.64 : x
  2. Step 2: Convert to fraction form
    789.68/1,184.68 = 269.64/x
  3. Step 3: Cross multiply
    789.68x = 1,184.68 × 269.64
  4. Step 4: Simplify right side
    789.68x = 319,437.12
  5. Step 5: Solve for x
    x = 319,437.12/789.68
  6. Step 6: Final answer
    x = 404.51

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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.