Home / 2,130.88-2,940.68-1,291.74

Finding the Fourth Proportional to 2,130.88, 2,940.68 and 1,291.74

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Solution

The fourth proportional to 2,130.88, 2,940.68 and 1,291.74 is: 1,782.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.88 : 2,940.68 = 1,291.74 : x
  2. Step 2: Convert to fraction form
    2,130.88/2,940.68 = 1,291.74/x
  3. Step 3: Cross multiply
    2,130.88x = 2,940.68 × 1,291.74
  4. Step 4: Simplify right side
    2,130.88x = 3,798,593.98
  5. Step 5: Solve for x
    x = 3,798,593.98/2,130.88
  6. Step 6: Final answer
    x = 1,782.64

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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.