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Finding the Fourth Proportional to 306.08, 421.74 and 223.04

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Solution

The fourth proportional to 306.08, 421.74 and 223.04 is: 307.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.08 : 421.74 = 223.04 : x
  2. Step 2: Convert to fraction form
    306.08/421.74 = 223.04/x
  3. Step 3: Cross multiply
    306.08x = 421.74 × 223.04
  4. Step 4: Simplify right side
    306.08x = 94,064.89
  5. Step 5: Solve for x
    x = 94,064.89/306.08
  6. Step 6: Final answer
    x = 307.32

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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.