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Finding the Fourth Proportional to 1,485.58, 2,049.92 and 822.34

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Solution

The fourth proportional to 1,485.58, 2,049.92 and 822.34 is: 1,134.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.58 : 2,049.92 = 822.34 : x
  2. Step 2: Convert to fraction form
    1,485.58/2,049.92 = 822.34/x
  3. Step 3: Cross multiply
    1,485.58x = 2,049.92 × 822.34
  4. Step 4: Simplify right side
    1,485.58x = 1,685,731.21
  5. Step 5: Solve for x
    x = 1,685,731.21/1,485.58
  6. Step 6: Final answer
    x = 1,134.73

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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.