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Finding the Fourth Proportional to 3,615.75, 4,989.78 and 1,959.75

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Solution

The fourth proportional to 3,615.75, 4,989.78 and 1,959.75 is: 2,704.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.75 : 4,989.78 = 1,959.75 : x
  2. Step 2: Convert to fraction form
    3,615.75/4,989.78 = 1,959.75/x
  3. Step 3: Cross multiply
    3,615.75x = 4,989.78 × 1,959.75
  4. Step 4: Simplify right side
    3,615.75x = 9,778,721.36
  5. Step 5: Solve for x
    x = 9,778,721.36/3,615.75
  6. Step 6: Final answer
    x = 2,704.48

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1.5x scale

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.