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Finding the Fourth Proportional to 1,721.09, 2,375.08 and 935.12

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Solution

The fourth proportional to 1,721.09, 2,375.08 and 935.12 is: 1,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.09 : 2,375.08 = 935.12 : x
  2. Step 2: Convert to fraction form
    1,721.09/2,375.08 = 935.12/x
  3. Step 3: Cross multiply
    1,721.09x = 2,375.08 × 935.12
  4. Step 4: Simplify right side
    1,721.09x = 2,220,970.60
  5. Step 5: Solve for x
    x = 2,220,970.60/1,721.09
  6. Step 6: Final answer
    x = 1,290.45

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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.