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Finding the Fourth Proportional to 1,356.49, 2,034.78 and 382.56

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Solution

The fourth proportional to 1,356.49, 2,034.78 and 382.56 is: 573.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.49 : 2,034.78 = 382.56 : x
  2. Step 2: Convert to fraction form
    1,356.49/2,034.78 = 382.56/x
  3. Step 3: Cross multiply
    1,356.49x = 2,034.78 × 382.56
  4. Step 4: Simplify right side
    1,356.49x = 778,425.44
  5. Step 5: Solve for x
    x = 778,425.44/1,356.49
  6. Step 6: Final answer
    x = 573.85

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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.