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Finding the Fourth Proportional to 251.00, 346.35 and 138.95

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Solution

The fourth proportional to 251.00, 346.35 and 138.95 is: 191.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.00 : 346.35 = 138.95 : x
  2. Step 2: Convert to fraction form
    251.00/346.35 = 138.95/x
  3. Step 3: Cross multiply
    251.00x = 346.35 × 138.95
  4. Step 4: Simplify right side
    251.00x = 48,123.60
  5. Step 5: Solve for x
    x = 48,123.60/251.00
  6. Step 6: Final answer
    x = 191.73

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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.