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Finding the Fourth Proportional to 789.20, 1,183.88 and 302.16

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Solution

The fourth proportional to 789.20, 1,183.88 and 302.16 is: 453.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.20 : 1,183.88 = 302.16 : x
  2. Step 2: Convert to fraction form
    789.20/1,183.88 = 302.16/x
  3. Step 3: Cross multiply
    789.20x = 1,183.88 × 302.16
  4. Step 4: Simplify right side
    789.20x = 357,721.18
  5. Step 5: Solve for x
    x = 357,721.18/789.20
  6. Step 6: Final answer
    x = 453.27

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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.