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Finding the Fourth Proportional to 662.35, 912.11 and 620.09

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Solution

The fourth proportional to 662.35, 912.11 and 620.09 is: 853.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.35 : 912.11 = 620.09 : x
  2. Step 2: Convert to fraction form
    662.35/912.11 = 620.09/x
  3. Step 3: Cross multiply
    662.35x = 912.11 × 620.09
  4. Step 4: Simplify right side
    662.35x = 565,590.29
  5. Step 5: Solve for x
    x = 565,590.29/662.35
  6. Step 6: Final answer
    x = 853.91

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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.