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Finding the Fourth Proportional to 306.45, 423 and 232.95

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Solution

The fourth proportional to 306.45, 423 and 232.95 is: 321.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.45 : 423 = 232.95 : x
  2. Step 2: Convert to fraction form
    306.45/423 = 232.95/x
  3. Step 3: Cross multiply
    306.45x = 423 × 232.95
  4. Step 4: Simplify right side
    306.45x = 98,537.85
  5. Step 5: Solve for x
    x = 98,537.85/306.45
  6. Step 6: Final answer
    x = 321.55

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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.