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Finding the Fourth Proportional to 839.98, 1,251.44 and 798.67

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Solution

The fourth proportional to 839.98, 1,251.44 and 798.67 is: 1,189.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.98 : 1,251.44 = 798.67 : x
  2. Step 2: Convert to fraction form
    839.98/1,251.44 = 798.67/x
  3. Step 3: Cross multiply
    839.98x = 1,251.44 × 798.67
  4. Step 4: Simplify right side
    839.98x = 999,487.58
  5. Step 5: Solve for x
    x = 999,487.58/839.98
  6. Step 6: Final answer
    x = 1,189.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.