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Finding the Fourth Proportional to 303.21, 417.42 and 229.05

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Solution

The fourth proportional to 303.21, 417.42 and 229.05 is: 315.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.21 : 417.42 = 229.05 : x
  2. Step 2: Convert to fraction form
    303.21/417.42 = 229.05/x
  3. Step 3: Cross multiply
    303.21x = 417.42 × 229.05
  4. Step 4: Simplify right side
    303.21x = 95,610.05
  5. Step 5: Solve for x
    x = 95,610.05/303.21
  6. Step 6: Final answer
    x = 315.33

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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.