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Finding the Fourth Proportional to 251.55, 346.35 and 221.94

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Solution

The fourth proportional to 251.55, 346.35 and 221.94 is: 305.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.55 : 346.35 = 221.94 : x
  2. Step 2: Convert to fraction form
    251.55/346.35 = 221.94/x
  3. Step 3: Cross multiply
    251.55x = 346.35 × 221.94
  4. Step 4: Simplify right side
    251.55x = 76,868.92
  5. Step 5: Solve for x
    x = 76,868.92/251.55
  6. Step 6: Final answer
    x = 305.58

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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.