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Finding the Fourth Proportional to 616.20, 850.35 and 354.21

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Solution

The fourth proportional to 616.20, 850.35 and 354.21 is: 488.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.20 : 850.35 = 354.21 : x
  2. Step 2: Convert to fraction form
    616.20/850.35 = 354.21/x
  3. Step 3: Cross multiply
    616.20x = 850.35 × 354.21
  4. Step 4: Simplify right side
    616.20x = 301,202.47
  5. Step 5: Solve for x
    x = 301,202.47/616.20
  6. Step 6: Final answer
    x = 488.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.