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Finding the Fourth Proportional to 902.04, 1,356.09 and 721.41

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Solution

The fourth proportional to 902.04, 1,356.09 and 721.41 is: 1,084.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.04 : 1,356.09 = 721.41 : x
  2. Step 2: Convert to fraction form
    902.04/1,356.09 = 721.41/x
  3. Step 3: Cross multiply
    902.04x = 1,356.09 × 721.41
  4. Step 4: Simplify right side
    902.04x = 978,296.89
  5. Step 5: Solve for x
    x = 978,296.89/902.04
  6. Step 6: Final answer
    x = 1,084.54

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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.