Home / 1,422.09-2,130.39-1,190.64

Finding the Fourth Proportional to 1,422.09, 2,130.39 and 1,190.64

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Solution

The fourth proportional to 1,422.09, 2,130.39 and 1,190.64 is: 1,783.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.09 : 2,130.39 = 1,190.64 : x
  2. Step 2: Convert to fraction form
    1,422.09/2,130.39 = 1,190.64/x
  3. Step 3: Cross multiply
    1,422.09x = 2,130.39 × 1,190.64
  4. Step 4: Simplify right side
    1,422.09x = 2,536,527.55
  5. Step 5: Solve for x
    x = 2,536,527.55/1,422.09
  6. Step 6: Final answer
    x = 1,783.66

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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.