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Finding the Fourth Proportional to 994.68, 1,485.65 and 789.48

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Solution

The fourth proportional to 994.68, 1,485.65 and 789.48 is: 1,179.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.68 : 1,485.65 = 789.48 : x
  2. Step 2: Convert to fraction form
    994.68/1,485.65 = 789.48/x
  3. Step 3: Cross multiply
    994.68x = 1,485.65 × 789.48
  4. Step 4: Simplify right side
    994.68x = 1,172,890.96
  5. Step 5: Solve for x
    x = 1,172,890.96/994.68
  6. Step 6: Final answer
    x = 1,179.16

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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.