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Finding the Fourth Proportional to 1,745.01, 2,615.22 and 820.40

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Solution

The fourth proportional to 1,745.01, 2,615.22 and 820.40 is: 1,229.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,745.01 : 2,615.22 = 820.40 : x
  2. Step 2: Convert to fraction form
    1,745.01/2,615.22 = 820.40/x
  3. Step 3: Cross multiply
    1,745.01x = 2,615.22 × 820.40
  4. Step 4: Simplify right side
    1,745.01x = 2,145,513.41
  5. Step 5: Solve for x
    x = 2,145,513.41/1,745.01
  6. Step 6: Final answer
    x = 1,229.51

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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.