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Finding the Fourth Proportional to 3,912.36, 5,868.54 and 3,390.72

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Solution

The fourth proportional to 3,912.36, 5,868.54 and 3,390.72 is: 5,086.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.36 : 5,868.54 = 3,390.72 : x
  2. Step 2: Convert to fraction form
    3,912.36/5,868.54 = 3,390.72/x
  3. Step 3: Cross multiply
    3,912.36x = 5,868.54 × 3,390.72
  4. Step 4: Simplify right side
    3,912.36x = 19,898,575.95
  5. Step 5: Solve for x
    x = 19,898,575.95/3,912.36
  6. Step 6: Final answer
    x = 5,086.08

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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.