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Finding the Fourth Proportional to 34.60, 51.99 and 30.85

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Solution

The fourth proportional to 34.60, 51.99 and 30.85 is: 46.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.60 : 51.99 = 30.85 : x
  2. Step 2: Convert to fraction form
    34.60/51.99 = 30.85/x
  3. Step 3: Cross multiply
    34.60x = 51.99 × 30.85
  4. Step 4: Simplify right side
    34.60x = 1,603.63
  5. Step 5: Solve for x
    x = 1,603.63/34.60
  6. Step 6: Final answer
    x = 46.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.