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Finding the Fourth Proportional to 525.43, 789.18 and 320.41

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Solution

The fourth proportional to 525.43, 789.18 and 320.41 is: 481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.43 : 789.18 = 320.41 : x
  2. Step 2: Convert to fraction form
    525.43/789.18 = 320.41/x
  3. Step 3: Cross multiply
    525.43x = 789.18 × 320.41
  4. Step 4: Simplify right side
    525.43x = 252,861.16
  5. Step 5: Solve for x
    x = 252,861.16/525.43
  6. Step 6: Final answer
    x = 481.25

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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.