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Finding the Fourth Proportional to 839.82, 1,258.73 and 633.70

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Solution

The fourth proportional to 839.82, 1,258.73 and 633.70 is: 949.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.82 : 1,258.73 = 633.70 : x
  2. Step 2: Convert to fraction form
    839.82/1,258.73 = 633.70/x
  3. Step 3: Cross multiply
    839.82x = 1,258.73 × 633.70
  4. Step 4: Simplify right side
    839.82x = 797,654.03
  5. Step 5: Solve for x
    x = 797,654.03/839.82
  6. Step 6: Final answer
    x = 949.80

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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.