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Finding the Fourth Proportional to 2,675.63, 4,012 and 1,213.99

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Solution

The fourth proportional to 2,675.63, 4,012 and 1,213.99 is: 1,820.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,675.63 : 4,012 = 1,213.99 : x
  2. Step 2: Convert to fraction form
    2,675.63/4,012 = 1,213.99/x
  3. Step 3: Cross multiply
    2,675.63x = 4,012 × 1,213.99
  4. Step 4: Simplify right side
    2,675.63x = 4,870,507.82
  5. Step 5: Solve for x
    x = 4,870,507.82/2,675.63
  6. Step 6: Final answer
    x = 1,820.32

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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.