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Finding the Fourth Proportional to 526.45, 789.63 and 320.97

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Solution

The fourth proportional to 526.45, 789.63 and 320.97 is: 481.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.45 : 789.63 = 320.97 : x
  2. Step 2: Convert to fraction form
    526.45/789.63 = 320.97/x
  3. Step 3: Cross multiply
    526.45x = 789.63 × 320.97
  4. Step 4: Simplify right side
    526.45x = 253,447.54
  5. Step 5: Solve for x
    x = 253,447.54/526.45
  6. Step 6: Final answer
    x = 481.43

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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.