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Finding the Fourth Proportional to 306.06, 421.88 and 207.65

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Solution

The fourth proportional to 306.06, 421.88 and 207.65 is: 286.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.06 : 421.88 = 207.65 : x
  2. Step 2: Convert to fraction form
    306.06/421.88 = 207.65/x
  3. Step 3: Cross multiply
    306.06x = 421.88 × 207.65
  4. Step 4: Simplify right side
    306.06x = 87,601.79
  5. Step 5: Solve for x
    x = 87,601.79/306.06
  6. Step 6: Final answer
    x = 286.22

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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.