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Finding the Fourth Proportional to 306.08, 421.06 and 268.57

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Solution

The fourth proportional to 306.08, 421.06 and 268.57 is: 369.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.08 : 421.06 = 268.57 : x
  2. Step 2: Convert to fraction form
    306.08/421.06 = 268.57/x
  3. Step 3: Cross multiply
    306.08x = 421.06 × 268.57
  4. Step 4: Simplify right side
    306.08x = 113,083.41
  5. Step 5: Solve for x
    x = 113,083.41/306.08
  6. Step 6: Final answer
    x = 369.46

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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.