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Finding the Fourth Proportional to 1,137.36, 1,698.48 and 997.44

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Solution

The fourth proportional to 1,137.36, 1,698.48 and 997.44 is: 1,489.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.36 : 1,698.48 = 997.44 : x
  2. Step 2: Convert to fraction form
    1,137.36/1,698.48 = 997.44/x
  3. Step 3: Cross multiply
    1,137.36x = 1,698.48 × 997.44
  4. Step 4: Simplify right side
    1,137.36x = 1,694,131.89
  5. Step 5: Solve for x
    x = 1,694,131.89/1,137.36
  6. Step 6: Final answer
    x = 1,489.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.