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Finding the Fourth Proportional to 1,745.95, 2,619 and 868.87

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Solution

The fourth proportional to 1,745.95, 2,619 and 868.87 is: 1,303.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,745.95 : 2,619 = 868.87 : x
  2. Step 2: Convert to fraction form
    1,745.95/2,619 = 868.87/x
  3. Step 3: Cross multiply
    1,745.95x = 2,619 × 868.87
  4. Step 4: Simplify right side
    1,745.95x = 2,275,570.53
  5. Step 5: Solve for x
    x = 2,275,570.53/1,745.95
  6. Step 6: Final answer
    x = 1,303.34

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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.