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Finding the Fourth Proportional to 1,484.20, 2,223.84 and 789.88

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Solution

The fourth proportional to 1,484.20, 2,223.84 and 789.88 is: 1,183.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.20 : 2,223.84 = 789.88 : x
  2. Step 2: Convert to fraction form
    1,484.20/2,223.84 = 789.88/x
  3. Step 3: Cross multiply
    1,484.20x = 2,223.84 × 789.88
  4. Step 4: Simplify right side
    1,484.20x = 1,756,566.74
  5. Step 5: Solve for x
    x = 1,756,566.74/1,484.20
  6. Step 6: Final answer
    x = 1,183.51

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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.