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Finding the Fourth Proportional to 902.25, 1,245.30 and 619.05

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Solution

The fourth proportional to 902.25, 1,245.30 and 619.05 is: 854.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.25 : 1,245.30 = 619.05 : x
  2. Step 2: Convert to fraction form
    902.25/1,245.30 = 619.05/x
  3. Step 3: Cross multiply
    902.25x = 1,245.30 × 619.05
  4. Step 4: Simplify right side
    902.25x = 770,905.31
  5. Step 5: Solve for x
    x = 770,905.31/902.25
  6. Step 6: Final answer
    x = 854.43

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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.