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Finding the Fourth Proportional to 1,485.01, 2,049.60 and 855.91

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Solution

The fourth proportional to 1,485.01, 2,049.60 and 855.91 is: 1,181.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.01 : 2,049.60 = 855.91 : x
  2. Step 2: Convert to fraction form
    1,485.01/2,049.60 = 855.91/x
  3. Step 3: Cross multiply
    1,485.01x = 2,049.60 × 855.91
  4. Step 4: Simplify right side
    1,485.01x = 1,754,273.14
  5. Step 5: Solve for x
    x = 1,754,273.14/1,485.01
  6. Step 6: Final answer
    x = 1,181.32

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1.5x scale

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.