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Finding the Fourth Proportional to 1,806.88, 2,705.20 and 1,351.20

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Solution

The fourth proportional to 1,806.88, 2,705.20 and 1,351.20 is: 2,022.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.88 : 2,705.20 = 1,351.20 : x
  2. Step 2: Convert to fraction form
    1,806.88/2,705.20 = 1,351.20/x
  3. Step 3: Cross multiply
    1,806.88x = 2,705.20 × 1,351.20
  4. Step 4: Simplify right side
    1,806.88x = 3,655,266.24
  5. Step 5: Solve for x
    x = 3,655,266.24/1,806.88
  6. Step 6: Final answer
    x = 2,022.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.