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Finding the Fourth Proportional to 2,615.87, 3,913.26 and 2,255.15

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Solution

The fourth proportional to 2,615.87, 3,913.26 and 2,255.15 is: 3,373.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.87 : 3,913.26 = 2,255.15 : x
  2. Step 2: Convert to fraction form
    2,615.87/3,913.26 = 2,255.15/x
  3. Step 3: Cross multiply
    2,615.87x = 3,913.26 × 2,255.15
  4. Step 4: Simplify right side
    2,615.87x = 8,824,968.72
  5. Step 5: Solve for x
    x = 8,824,968.72/2,615.87
  6. Step 6: Final answer
    x = 3,373.63

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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.