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Finding the Fourth Proportional to 1,800.80, 2,485.35 and 1,055.06

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Solution

The fourth proportional to 1,800.80, 2,485.35 and 1,055.06 is: 1,456.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,800.80 : 2,485.35 = 1,055.06 : x
  2. Step 2: Convert to fraction form
    1,800.80/2,485.35 = 1,055.06/x
  3. Step 3: Cross multiply
    1,800.80x = 2,485.35 × 1,055.06
  4. Step 4: Simplify right side
    1,800.80x = 2,622,183.91
  5. Step 5: Solve for x
    x = 2,622,183.91/1,800.80
  6. Step 6: Final answer
    x = 1,456.12

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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.