Home / 3,172.40-4,756.60-1,324.80

Finding the Fourth Proportional to 3,172.40, 4,756.60 and 1,324.80

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Solution

The fourth proportional to 3,172.40, 4,756.60 and 1,324.80 is: 1,986.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.40 : 4,756.60 = 1,324.80 : x
  2. Step 2: Convert to fraction form
    3,172.40/4,756.60 = 1,324.80/x
  3. Step 3: Cross multiply
    3,172.40x = 4,756.60 × 1,324.80
  4. Step 4: Simplify right side
    3,172.40x = 6,301,543.68
  5. Step 5: Solve for x
    x = 6,301,543.68/3,172.40
  6. Step 6: Final answer
    x = 1,986.36

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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.