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Finding the Fourth Proportional to 3,312.75, 4,571.43 and 1,986.20

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Solution

The fourth proportional to 3,312.75, 4,571.43 and 1,986.20 is: 2,740.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.75 : 4,571.43 = 1,986.20 : x
  2. Step 2: Convert to fraction form
    3,312.75/4,571.43 = 1,986.20/x
  3. Step 3: Cross multiply
    3,312.75x = 4,571.43 × 1,986.20
  4. Step 4: Simplify right side
    3,312.75x = 9,079,774.27
  5. Step 5: Solve for x
    x = 9,079,774.27/3,312.75
  6. Step 6: Final answer
    x = 2,740.86

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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.