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Finding the Fourth Proportional to 1,745.94, 2,615.37 and 865.79

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Solution

The fourth proportional to 1,745.94, 2,615.37 and 865.79 is: 1,296.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,745.94 : 2,615.37 = 865.79 : x
  2. Step 2: Convert to fraction form
    1,745.94/2,615.37 = 865.79/x
  3. Step 3: Cross multiply
    1,745.94x = 2,615.37 × 865.79
  4. Step 4: Simplify right side
    1,745.94x = 2,264,348.12
  5. Step 5: Solve for x
    x = 2,264,348.12/1,745.94
  6. Step 6: Final answer
    x = 1,296.92

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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.