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Finding the Fourth Proportional to 789.89, 1,182.35 and 511.88

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Solution

The fourth proportional to 789.89, 1,182.35 and 511.88 is: 766.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.89 : 1,182.35 = 511.88 : x
  2. Step 2: Convert to fraction form
    789.89/1,182.35 = 511.88/x
  3. Step 3: Cross multiply
    789.89x = 1,182.35 × 511.88
  4. Step 4: Simplify right side
    789.89x = 605,212.85
  5. Step 5: Solve for x
    x = 605,212.85/789.89
  6. Step 6: Final answer
    x = 766.20

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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.