Home / 2,131.40-2,941.28-1,199.90

Finding the Fourth Proportional to 2,131.40, 2,941.28 and 1,199.90

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Solution

The fourth proportional to 2,131.40, 2,941.28 and 1,199.90 is: 1,655.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.40 : 2,941.28 = 1,199.90 : x
  2. Step 2: Convert to fraction form
    2,131.40/2,941.28 = 1,199.90/x
  3. Step 3: Cross multiply
    2,131.40x = 2,941.28 × 1,199.90
  4. Step 4: Simplify right side
    2,131.40x = 3,529,241.87
  5. Step 5: Solve for x
    x = 3,529,241.87/2,131.40
  6. Step 6: Final answer
    x = 1,655.83

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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.