Home / 2,121.40-2,928.53-1,414.42

Finding the Fourth Proportional to 2,121.40, 2,928.53 and 1,414.42

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Solution

The fourth proportional to 2,121.40, 2,928.53 and 1,414.42 is: 1,952.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.40 : 2,928.53 = 1,414.42 : x
  2. Step 2: Convert to fraction form
    2,121.40/2,928.53 = 1,414.42/x
  3. Step 3: Cross multiply
    2,121.40x = 2,928.53 × 1,414.42
  4. Step 4: Simplify right side
    2,121.40x = 4,142,171.40
  5. Step 5: Solve for x
    x = 4,142,171.40/2,121.40
  6. Step 6: Final answer
    x = 1,952.57

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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.