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Finding the Fourth Proportional to 225.03, 308.61 and 215.68

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Solution

The fourth proportional to 225.03, 308.61 and 215.68 is: 295.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.03 : 308.61 = 215.68 : x
  2. Step 2: Convert to fraction form
    225.03/308.61 = 215.68/x
  3. Step 3: Cross multiply
    225.03x = 308.61 × 215.68
  4. Step 4: Simplify right side
    225.03x = 66,560.81
  5. Step 5: Solve for x
    x = 66,560.81/225.03
  6. Step 6: Final answer
    x = 295.79

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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.