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Finding the Fourth Proportional to 4,075, 6,112.50 and 1,643

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Solution

The fourth proportional to 4,075, 6,112.50 and 1,643 is: 2,464.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,075 : 6,112.50 = 1,643 : x
  2. Step 2: Convert to fraction form
    4,075/6,112.50 = 1,643/x
  3. Step 3: Cross multiply
    4,075x = 6,112.50 × 1,643
  4. Step 4: Simplify right side
    4,075x = 10,042,837.50
  5. Step 5: Solve for x
    x = 10,042,837.50/4,075
  6. Step 6: Final answer
    x = 2,464.50

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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.