Home / 2,190.32-3,022.35-1,405.43

Finding the Fourth Proportional to 2,190.32, 3,022.35 and 1,405.43

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Solution

The fourth proportional to 2,190.32, 3,022.35 and 1,405.43 is: 1,939.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.32 : 3,022.35 = 1,405.43 : x
  2. Step 2: Convert to fraction form
    2,190.32/3,022.35 = 1,405.43/x
  3. Step 3: Cross multiply
    2,190.32x = 3,022.35 × 1,405.43
  4. Step 4: Simplify right side
    2,190.32x = 4,247,701.36
  5. Step 5: Solve for x
    x = 4,247,701.36/2,190.32
  6. Step 6: Final answer
    x = 1,939.31

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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.