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Finding the Fourth Proportional to 1,954.11, 2,693.86 and 1,393.61

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Solution

The fourth proportional to 1,954.11, 2,693.86 and 1,393.61 is: 1,921.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,954.11 : 2,693.86 = 1,393.61 : x
  2. Step 2: Convert to fraction form
    1,954.11/2,693.86 = 1,393.61/x
  3. Step 3: Cross multiply
    1,954.11x = 2,693.86 × 1,393.61
  4. Step 4: Simplify right side
    1,954.11x = 3,754,173.28
  5. Step 5: Solve for x
    x = 3,754,173.28/1,954.11
  6. Step 6: Final answer
    x = 1,921.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.