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Finding the Fourth Proportional to 2,419.88, 3,629.81 and 776.39

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Solution

The fourth proportional to 2,419.88, 3,629.81 and 776.39 is: 1,164.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419.88 : 3,629.81 = 776.39 : x
  2. Step 2: Convert to fraction form
    2,419.88/3,629.81 = 776.39/x
  3. Step 3: Cross multiply
    2,419.88x = 3,629.81 × 776.39
  4. Step 4: Simplify right side
    2,419.88x = 2,818,131.98
  5. Step 5: Solve for x
    x = 2,818,131.98/2,419.88
  6. Step 6: Final answer
    x = 1,164.58

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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.