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Finding the Fourth Proportional to 1,721.45, 2,375.64 and 935.55

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Solution

The fourth proportional to 1,721.45, 2,375.64 and 935.55 is: 1,291.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.45 : 2,375.64 = 935.55 : x
  2. Step 2: Convert to fraction form
    1,721.45/2,375.64 = 935.55/x
  3. Step 3: Cross multiply
    1,721.45x = 2,375.64 × 935.55
  4. Step 4: Simplify right side
    1,721.45x = 2,222,517.59
  5. Step 5: Solve for x
    x = 2,222,517.59/1,721.45
  6. Step 6: Final answer
    x = 1,291.07

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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.