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Finding the Fourth Proportional to 1,738.03, 2,398 and 991.72

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Solution

The fourth proportional to 1,738.03, 2,398 and 991.72 is: 1,368.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,738.03 : 2,398 = 991.72 : x
  2. Step 2: Convert to fraction form
    1,738.03/2,398 = 991.72/x
  3. Step 3: Cross multiply
    1,738.03x = 2,398 × 991.72
  4. Step 4: Simplify right side
    1,738.03x = 2,378,144.56
  5. Step 5: Solve for x
    x = 2,378,144.56/1,738.03
  6. Step 6: Final answer
    x = 1,368.30

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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.