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Finding the Fourth Proportional to 3,912.78, 5,880.64 and 3,258.84

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Solution

The fourth proportional to 3,912.78, 5,880.64 and 3,258.84 is: 4,897.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.78 : 5,880.64 = 3,258.84 : x
  2. Step 2: Convert to fraction form
    3,912.78/5,880.64 = 3,258.84/x
  3. Step 3: Cross multiply
    3,912.78x = 5,880.64 × 3,258.84
  4. Step 4: Simplify right side
    3,912.78x = 19,164,064.86
  5. Step 5: Solve for x
    x = 19,164,064.86/3,912.78
  6. Step 6: Final answer
    x = 4,897.81

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1.5x scale

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.