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Finding the Fourth Proportional to 789.36, 1,184.42 and 356.48

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Solution

The fourth proportional to 789.36, 1,184.42 and 356.48 is: 534.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.36 : 1,184.42 = 356.48 : x
  2. Step 2: Convert to fraction form
    789.36/1,184.42 = 356.48/x
  3. Step 3: Cross multiply
    789.36x = 1,184.42 × 356.48
  4. Step 4: Simplify right side
    789.36x = 422,222.04
  5. Step 5: Solve for x
    x = 422,222.04/789.36
  6. Step 6: Final answer
    x = 534.89

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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.