Home / 2,130.71-2,940.65-1,291.41

Finding the Fourth Proportional to 2,130.71, 2,940.65 and 1,291.41

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Solution

The fourth proportional to 2,130.71, 2,940.65 and 1,291.41 is: 1,782.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.71 : 2,940.65 = 1,291.41 : x
  2. Step 2: Convert to fraction form
    2,130.71/2,940.65 = 1,291.41/x
  3. Step 3: Cross multiply
    2,130.71x = 2,940.65 × 1,291.41
  4. Step 4: Simplify right side
    2,130.71x = 3,797,584.82
  5. Step 5: Solve for x
    x = 3,797,584.82/2,130.71
  6. Step 6: Final answer
    x = 1,782.31

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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.