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Finding the Fourth Proportional to 1,231.42, 1,846.32 and 798.88

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Solution

The fourth proportional to 1,231.42, 1,846.32 and 798.88 is: 1,197.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.42 : 1,846.32 = 798.88 : x
  2. Step 2: Convert to fraction form
    1,231.42/1,846.32 = 798.88/x
  3. Step 3: Cross multiply
    1,231.42x = 1,846.32 × 798.88
  4. Step 4: Simplify right side
    1,231.42x = 1,474,988.12
  5. Step 5: Solve for x
    x = 1,474,988.12/1,231.42
  6. Step 6: Final answer
    x = 1,197.79

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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.