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Finding the Fourth Proportional to 415.06, 622.14 and 209.50

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Solution

The fourth proportional to 415.06, 622.14 and 209.50 is: 314.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.06 : 622.14 = 209.50 : x
  2. Step 2: Convert to fraction form
    415.06/622.14 = 209.50/x
  3. Step 3: Cross multiply
    415.06x = 622.14 × 209.50
  4. Step 4: Simplify right side
    415.06x = 130,338.33
  5. Step 5: Solve for x
    x = 130,338.33/415.06
  6. Step 6: Final answer
    x = 314.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.