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Finding the Fourth Proportional to 302.74, 418.38 and 229.03

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Solution

The fourth proportional to 302.74, 418.38 and 229.03 is: 316.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.74 : 418.38 = 229.03 : x
  2. Step 2: Convert to fraction form
    302.74/418.38 = 229.03/x
  3. Step 3: Cross multiply
    302.74x = 418.38 × 229.03
  4. Step 4: Simplify right side
    302.74x = 95,821.57
  5. Step 5: Solve for x
    x = 95,821.57/302.74
  6. Step 6: Final answer
    x = 316.51

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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.