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Finding the Fourth Proportional to 900.33, 1,241.96 and 620.07

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Solution

The fourth proportional to 900.33, 1,241.96 and 620.07 is: 855.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.33 : 1,241.96 = 620.07 : x
  2. Step 2: Convert to fraction form
    900.33/1,241.96 = 620.07/x
  3. Step 3: Cross multiply
    900.33x = 1,241.96 × 620.07
  4. Step 4: Simplify right side
    900.33x = 770,102.14
  5. Step 5: Solve for x
    x = 770,102.14/900.33
  6. Step 6: Final answer
    x = 855.36

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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.