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Finding the Fourth Proportional to 816.93, 1,225.97 and 330.10

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Solution

The fourth proportional to 816.93, 1,225.97 and 330.10 is: 495.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.93 : 1,225.97 = 330.10 : x
  2. Step 2: Convert to fraction form
    816.93/1,225.97 = 330.10/x
  3. Step 3: Cross multiply
    816.93x = 1,225.97 × 330.10
  4. Step 4: Simplify right side
    816.93x = 404,692.70
  5. Step 5: Solve for x
    x = 404,692.70/816.93
  6. Step 6: Final answer
    x = 495.38

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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.