Home / 1,816.91-2,505.92-1,219.20

Finding the Fourth Proportional to 1,816.91, 2,505.92 and 1,219.20

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Solution

The fourth proportional to 1,816.91, 2,505.92 and 1,219.20 is: 1,681.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.91 : 2,505.92 = 1,219.20 : x
  2. Step 2: Convert to fraction form
    1,816.91/2,505.92 = 1,219.20/x
  3. Step 3: Cross multiply
    1,816.91x = 2,505.92 × 1,219.20
  4. Step 4: Simplify right side
    1,816.91x = 3,055,220.97
  5. Step 5: Solve for x
    x = 3,055,220.97/1,816.91
  6. Step 6: Final answer
    x = 1,681.55

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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.