Home / 2,130.55-2,940.68-1,422.43

Finding the Fourth Proportional to 2,130.55, 2,940.68 and 1,422.43

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Solution

The fourth proportional to 2,130.55, 2,940.68 and 1,422.43 is: 1,963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.55 : 2,940.68 = 1,422.43 : x
  2. Step 2: Convert to fraction form
    2,130.55/2,940.68 = 1,422.43/x
  3. Step 3: Cross multiply
    2,130.55x = 2,940.68 × 1,422.43
  4. Step 4: Simplify right side
    2,130.55x = 4,182,911.45
  5. Step 5: Solve for x
    x = 4,182,911.45/2,130.55
  6. Step 6: Final answer
    x = 1,963.30

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1.5x scale

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.