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Finding the Fourth Proportional to 1,485.54, 2,049.90 and 855.92

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Solution

The fourth proportional to 1,485.54, 2,049.90 and 855.92 is: 1,181.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.54 : 2,049.90 = 855.92 : x
  2. Step 2: Convert to fraction form
    1,485.54/2,049.90 = 855.92/x
  3. Step 3: Cross multiply
    1,485.54x = 2,049.90 × 855.92
  4. Step 4: Simplify right side
    1,485.54x = 1,754,540.16
  5. Step 5: Solve for x
    x = 1,754,540.16/1,485.54
  6. Step 6: Final answer
    x = 1,181.08

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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.