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Finding the Fourth Proportional to 989.89, 1,484.12 and 794.27

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Solution

The fourth proportional to 989.89, 1,484.12 and 794.27 is: 1,190.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.89 : 1,484.12 = 794.27 : x
  2. Step 2: Convert to fraction form
    989.89/1,484.12 = 794.27/x
  3. Step 3: Cross multiply
    989.89x = 1,484.12 × 794.27
  4. Step 4: Simplify right side
    989.89x = 1,178,797.69
  5. Step 5: Solve for x
    x = 1,178,797.69/989.89
  6. Step 6: Final answer
    x = 1,190.84

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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.