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Finding the Fourth Proportional to 306.04, 421.60 and 212.62

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Solution

The fourth proportional to 306.04, 421.60 and 212.62 is: 292.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.04 : 421.60 = 212.62 : x
  2. Step 2: Convert to fraction form
    306.04/421.60 = 212.62/x
  3. Step 3: Cross multiply
    306.04x = 421.60 × 212.62
  4. Step 4: Simplify right side
    306.04x = 89,640.59
  5. Step 5: Solve for x
    x = 89,640.59/306.04
  6. Step 6: Final answer
    x = 292.90

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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.