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Finding the Fourth Proportional to 1,356.21, 2,034.09 and 382.09

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Solution

The fourth proportional to 1,356.21, 2,034.09 and 382.09 is: 573.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.21 : 2,034.09 = 382.09 : x
  2. Step 2: Convert to fraction form
    1,356.21/2,034.09 = 382.09/x
  3. Step 3: Cross multiply
    1,356.21x = 2,034.09 × 382.09
  4. Step 4: Simplify right side
    1,356.21x = 777,195.28
  5. Step 5: Solve for x
    x = 777,195.28/1,356.21
  6. Step 6: Final answer
    x = 573.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.