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Finding the Fourth Proportional to 1,928.63, 2,893.08 and 774.38

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Solution

The fourth proportional to 1,928.63, 2,893.08 and 774.38 is: 1,161.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.63 : 2,893.08 = 774.38 : x
  2. Step 2: Convert to fraction form
    1,928.63/2,893.08 = 774.38/x
  3. Step 3: Cross multiply
    1,928.63x = 2,893.08 × 774.38
  4. Step 4: Simplify right side
    1,928.63x = 2,240,328.83
  5. Step 5: Solve for x
    x = 2,240,328.83/1,928.63
  6. Step 6: Final answer
    x = 1,161.62

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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.