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Finding the Fourth Proportional to 527.14, 789.76 and 321.60

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Solution

The fourth proportional to 527.14, 789.76 and 321.60 is: 481.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.14 : 789.76 = 321.60 : x
  2. Step 2: Convert to fraction form
    527.14/789.76 = 321.60/x
  3. Step 3: Cross multiply
    527.14x = 789.76 × 321.60
  4. Step 4: Simplify right side
    527.14x = 253,986.82
  5. Step 5: Solve for x
    x = 253,986.82/527.14
  6. Step 6: Final answer
    x = 481.82

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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.