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Finding the Fourth Proportional to 305.41, 421.82 and 222.89

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Solution

The fourth proportional to 305.41, 421.82 and 222.89 is: 307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.41 : 421.82 = 222.89 : x
  2. Step 2: Convert to fraction form
    305.41/421.82 = 222.89/x
  3. Step 3: Cross multiply
    305.41x = 421.82 × 222.89
  4. Step 4: Simplify right side
    305.41x = 94,019.46
  5. Step 5: Solve for x
    x = 94,019.46/305.41
  6. Step 6: Final answer
    x = 307.85

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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.