Home / 2,190.32-3,022.47-1,245.86

Finding the Fourth Proportional to 2,190.32, 3,022.47 and 1,245.86

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Solution

The fourth proportional to 2,190.32, 3,022.47 and 1,245.86 is: 1,719.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.32 : 3,022.47 = 1,245.86 : x
  2. Step 2: Convert to fraction form
    2,190.32/3,022.47 = 1,245.86/x
  3. Step 3: Cross multiply
    2,190.32x = 3,022.47 × 1,245.86
  4. Step 4: Simplify right side
    2,190.32x = 3,765,574.47
  5. Step 5: Solve for x
    x = 3,765,574.47/2,190.32
  6. Step 6: Final answer
    x = 1,719.19

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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.