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Finding the Fourth Proportional to 1,397.22, 2,091.46 and 902.97

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Solution

The fourth proportional to 1,397.22, 2,091.46 and 902.97 is: 1,351.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.22 : 2,091.46 = 902.97 : x
  2. Step 2: Convert to fraction form
    1,397.22/2,091.46 = 902.97/x
  3. Step 3: Cross multiply
    1,397.22x = 2,091.46 × 902.97
  4. Step 4: Simplify right side
    1,397.22x = 1,888,525.64
  5. Step 5: Solve for x
    x = 1,888,525.64/1,397.22
  6. Step 6: Final answer
    x = 1,351.63

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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.