Home / 1,909.71-2,634.39-1,386.18

Finding the Fourth Proportional to 1,909.71, 2,634.39 and 1,386.18

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Solution

The fourth proportional to 1,909.71, 2,634.39 and 1,386.18 is: 1,912.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.71 : 2,634.39 = 1,386.18 : x
  2. Step 2: Convert to fraction form
    1,909.71/2,634.39 = 1,386.18/x
  3. Step 3: Cross multiply
    1,909.71x = 2,634.39 × 1,386.18
  4. Step 4: Simplify right side
    1,909.71x = 3,651,738.73
  5. Step 5: Solve for x
    x = 3,651,738.73/1,909.71
  6. Step 6: Final answer
    x = 1,912.20

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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.