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Finding the Fourth Proportional to 225.03, 308.72 and 211.05

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Solution

The fourth proportional to 225.03, 308.72 and 211.05 is: 289.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.03 : 308.72 = 211.05 : x
  2. Step 2: Convert to fraction form
    225.03/308.72 = 211.05/x
  3. Step 3: Cross multiply
    225.03x = 308.72 × 211.05
  4. Step 4: Simplify right side
    225.03x = 65,154.30
  5. Step 5: Solve for x
    x = 65,154.30/225.03
  6. Step 6: Final answer
    x = 289.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.