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Finding the Fourth Proportional to 1,721.98, 2,375.22 and 1,328.32

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Solution

The fourth proportional to 1,721.98, 2,375.22 and 1,328.32 is: 1,832.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.98 : 2,375.22 = 1,328.32 : x
  2. Step 2: Convert to fraction form
    1,721.98/2,375.22 = 1,328.32/x
  3. Step 3: Cross multiply
    1,721.98x = 2,375.22 × 1,328.32
  4. Step 4: Simplify right side
    1,721.98x = 3,155,052.23
  5. Step 5: Solve for x
    x = 3,155,052.23/1,721.98
  6. Step 6: Final answer
    x = 1,832.22

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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.