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Finding the Fourth Proportional to 1,721.43, 2,375.55 and 935.48

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Solution

The fourth proportional to 1,721.43, 2,375.55 and 935.48 is: 1,290.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.43 : 2,375.55 = 935.48 : x
  2. Step 2: Convert to fraction form
    1,721.43/2,375.55 = 935.48/x
  3. Step 3: Cross multiply
    1,721.43x = 2,375.55 × 935.48
  4. Step 4: Simplify right side
    1,721.43x = 2,222,267.64
  5. Step 5: Solve for x
    x = 2,222,267.64/1,721.43
  6. Step 6: Final answer
    x = 1,290.94

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1.5x scale

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.