Home / 1,419.40-2,126.64-1,268.72

Finding the Fourth Proportional to 1,419.40, 2,126.64 and 1,268.72

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Solution

The fourth proportional to 1,419.40, 2,126.64 and 1,268.72 is: 1,900.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.40 : 2,126.64 = 1,268.72 : x
  2. Step 2: Convert to fraction form
    1,419.40/2,126.64 = 1,268.72/x
  3. Step 3: Cross multiply
    1,419.40x = 2,126.64 × 1,268.72
  4. Step 4: Simplify right side
    1,419.40x = 2,698,110.70
  5. Step 5: Solve for x
    x = 2,698,110.70/1,419.40
  6. Step 6: Final answer
    x = 1,900.88

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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.