Home / 2,615.80-3,611.39-1,720.95

Finding the Fourth Proportional to 2,615.80, 3,611.39 and 1,720.95

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Solution

The fourth proportional to 2,615.80, 3,611.39 and 1,720.95 is: 2,375.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.80 : 3,611.39 = 1,720.95 : x
  2. Step 2: Convert to fraction form
    2,615.80/3,611.39 = 1,720.95/x
  3. Step 3: Cross multiply
    2,615.80x = 3,611.39 × 1,720.95
  4. Step 4: Simplify right side
    2,615.80x = 6,215,013.02
  5. Step 5: Solve for x
    x = 6,215,013.02/2,615.80
  6. Step 6: Final answer
    x = 2,375.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.