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Finding the Fourth Proportional to 616.21, 850.40 and 354.31

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Solution

The fourth proportional to 616.21, 850.40 and 354.31 is: 488.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.21 : 850.40 = 354.31 : x
  2. Step 2: Convert to fraction form
    616.21/850.40 = 354.31/x
  3. Step 3: Cross multiply
    616.21x = 850.40 × 354.31
  4. Step 4: Simplify right side
    616.21x = 301,305.22
  5. Step 5: Solve for x
    x = 301,305.22/616.21
  6. Step 6: Final answer
    x = 488.97

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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.