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Finding the Fourth Proportional to 526.82, 789.18 and 321.50

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Solution

The fourth proportional to 526.82, 789.18 and 321.50 is: 481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.82 : 789.18 = 321.50 : x
  2. Step 2: Convert to fraction form
    526.82/789.18 = 321.50/x
  3. Step 3: Cross multiply
    526.82x = 789.18 × 321.50
  4. Step 4: Simplify right side
    526.82x = 253,721.37
  5. Step 5: Solve for x
    x = 253,721.37/526.82
  6. Step 6: Final answer
    x = 481.61

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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.