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Finding the Fourth Proportional to 1,375.75, 2,063.69 and 401.94

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Solution

The fourth proportional to 1,375.75, 2,063.69 and 401.94 is: 602.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.75 : 2,063.69 = 401.94 : x
  2. Step 2: Convert to fraction form
    1,375.75/2,063.69 = 401.94/x
  3. Step 3: Cross multiply
    1,375.75x = 2,063.69 × 401.94
  4. Step 4: Simplify right side
    1,375.75x = 829,479.56
  5. Step 5: Solve for x
    x = 829,479.56/1,375.75
  6. Step 6: Final answer
    x = 602.93

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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.