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Finding the Fourth Proportional to 1,761.82, 2,643.63 and 775.32

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Solution

The fourth proportional to 1,761.82, 2,643.63 and 775.32 is: 1,163.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.82 : 2,643.63 = 775.32 : x
  2. Step 2: Convert to fraction form
    1,761.82/2,643.63 = 775.32/x
  3. Step 3: Cross multiply
    1,761.82x = 2,643.63 × 775.32
  4. Step 4: Simplify right side
    1,761.82x = 2,049,659.21
  5. Step 5: Solve for x
    x = 2,049,659.21/1,761.82
  6. Step 6: Final answer
    x = 1,163.38

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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.