Home / 2,121.62-2,927.73-1,190.42

Finding the Fourth Proportional to 2,121.62, 2,927.73 and 1,190.42

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Solution

The fourth proportional to 2,121.62, 2,927.73 and 1,190.42 is: 1,642.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.62 : 2,927.73 = 1,190.42 : x
  2. Step 2: Convert to fraction form
    2,121.62/2,927.73 = 1,190.42/x
  3. Step 3: Cross multiply
    2,121.62x = 2,927.73 × 1,190.42
  4. Step 4: Simplify right side
    2,121.62x = 3,485,228.35
  5. Step 5: Solve for x
    x = 3,485,228.35/2,121.62
  6. Step 6: Final answer
    x = 1,642.72

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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.