Home / 2,122.13-2,928.80-1,190.63

Finding the Fourth Proportional to 2,122.13, 2,928.80 and 1,190.63

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Solution

The fourth proportional to 2,122.13, 2,928.80 and 1,190.63 is: 1,643.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.13 : 2,928.80 = 1,190.63 : x
  2. Step 2: Convert to fraction form
    2,122.13/2,928.80 = 1,190.63/x
  3. Step 3: Cross multiply
    2,122.13x = 2,928.80 × 1,190.63
  4. Step 4: Simplify right side
    2,122.13x = 3,487,105.48
  5. Step 5: Solve for x
    x = 3,487,105.48/2,122.13
  6. Step 6: Final answer
    x = 1,643.21

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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.