Home / 3,171.20-4,756.80-1,611.20

Finding the Fourth Proportional to 3,171.20, 4,756.80 and 1,611.20

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Solution

The fourth proportional to 3,171.20, 4,756.80 and 1,611.20 is: 2,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.20 : 4,756.80 = 1,611.20 : x
  2. Step 2: Convert to fraction form
    3,171.20/4,756.80 = 1,611.20/x
  3. Step 3: Cross multiply
    3,171.20x = 4,756.80 × 1,611.20
  4. Step 4: Simplify right side
    3,171.20x = 7,664,156.16
  5. Step 5: Solve for x
    x = 7,664,156.16/3,171.20
  6. Step 6: Final answer
    x = 2,416.80

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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.