Home / 1,371.74-2,067.90-1,281.35

Finding the Fourth Proportional to 1,371.74, 2,067.90 and 1,281.35

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Solution

The fourth proportional to 1,371.74, 2,067.90 and 1,281.35 is: 1,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.74 : 2,067.90 = 1,281.35 : x
  2. Step 2: Convert to fraction form
    1,371.74/2,067.90 = 1,281.35/x
  3. Step 3: Cross multiply
    1,371.74x = 2,067.90 × 1,281.35
  4. Step 4: Simplify right side
    1,371.74x = 2,649,704.03
  5. Step 5: Solve for x
    x = 2,649,704.03/1,371.74
  6. Step 6: Final answer
    x = 1,931.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.