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Finding the Fourth Proportional to 984.20, 1,476.25 and 367.86

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Solution

The fourth proportional to 984.20, 1,476.25 and 367.86 is: 551.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.20 : 1,476.25 = 367.86 : x
  2. Step 2: Convert to fraction form
    984.20/1,476.25 = 367.86/x
  3. Step 3: Cross multiply
    984.20x = 1,476.25 × 367.86
  4. Step 4: Simplify right side
    984.20x = 543,045.94
  5. Step 5: Solve for x
    x = 543,045.94/984.20
  6. Step 6: Final answer
    x = 551.76

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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.