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Finding the Fourth Proportional to 1,951.14, 2,927.69 and 855.21

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Solution

The fourth proportional to 1,951.14, 2,927.69 and 855.21 is: 1,283.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.14 : 2,927.69 = 855.21 : x
  2. Step 2: Convert to fraction form
    1,951.14/2,927.69 = 855.21/x
  3. Step 3: Cross multiply
    1,951.14x = 2,927.69 × 855.21
  4. Step 4: Simplify right side
    1,951.14x = 2,503,788.02
  5. Step 5: Solve for x
    x = 2,503,788.02/1,951.14
  6. Step 6: Final answer
    x = 1,283.24

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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.