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Finding the Fourth Proportional to 2,763.96, 4,145.09 and 914.64

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Solution

The fourth proportional to 2,763.96, 4,145.09 and 914.64 is: 1,371.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.96 : 4,145.09 = 914.64 : x
  2. Step 2: Convert to fraction form
    2,763.96/4,145.09 = 914.64/x
  3. Step 3: Cross multiply
    2,763.96x = 4,145.09 × 914.64
  4. Step 4: Simplify right side
    2,763.96x = 3,791,260.54
  5. Step 5: Solve for x
    x = 3,791,260.54/2,763.96
  6. Step 6: Final answer
    x = 1,371.68

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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.