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Finding the Fourth Proportional to 1,361.96, 2,040.81 and 776.24

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Solution

The fourth proportional to 1,361.96, 2,040.81 and 776.24 is: 1,163.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.96 : 2,040.81 = 776.24 : x
  2. Step 2: Convert to fraction form
    1,361.96/2,040.81 = 776.24/x
  3. Step 3: Cross multiply
    1,361.96x = 2,040.81 × 776.24
  4. Step 4: Simplify right side
    1,361.96x = 1,584,158.35
  5. Step 5: Solve for x
    x = 1,584,158.35/1,361.96
  6. Step 6: Final answer
    x = 1,163.15

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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.