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Finding the Fourth Proportional to 209.10, 310.85 and 202.96

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Solution

The fourth proportional to 209.10, 310.85 and 202.96 is: 301.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.10 : 310.85 = 202.96 : x
  2. Step 2: Convert to fraction form
    209.10/310.85 = 202.96/x
  3. Step 3: Cross multiply
    209.10x = 310.85 × 202.96
  4. Step 4: Simplify right side
    209.10x = 63,090.25
  5. Step 5: Solve for x
    x = 63,090.25/209.10
  6. Step 6: Final answer
    x = 301.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.