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Finding the Fourth Proportional to 223.45, 307.73 and 218.68

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Solution

The fourth proportional to 223.45, 307.73 and 218.68 is: 301.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.45 : 307.73 = 218.68 : x
  2. Step 2: Convert to fraction form
    223.45/307.73 = 218.68/x
  3. Step 3: Cross multiply
    223.45x = 307.73 × 218.68
  4. Step 4: Simplify right side
    223.45x = 67,292.53
  5. Step 5: Solve for x
    x = 67,292.53/223.45
  6. Step 6: Final answer
    x = 301.16

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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.