Home / 3,120.32-4,679.20-1,172.48

Finding the Fourth Proportional to 3,120.32, 4,679.20 and 1,172.48

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Solution

The fourth proportional to 3,120.32, 4,679.20 and 1,172.48 is: 1,758.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.32 : 4,679.20 = 1,172.48 : x
  2. Step 2: Convert to fraction form
    3,120.32/4,679.20 = 1,172.48/x
  3. Step 3: Cross multiply
    3,120.32x = 4,679.20 × 1,172.48
  4. Step 4: Simplify right side
    3,120.32x = 5,486,268.42
  5. Step 5: Solve for x
    x = 5,486,268.42/3,120.32
  6. Step 6: Final answer
    x = 1,758.24

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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.