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Finding the Fourth Proportional to 528.15, 789.45 and 481.68

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Solution

The fourth proportional to 528.15, 789.45 and 481.68 is: 719.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.15 : 789.45 = 481.68 : x
  2. Step 2: Convert to fraction form
    528.15/789.45 = 481.68/x
  3. Step 3: Cross multiply
    528.15x = 789.45 × 481.68
  4. Step 4: Simplify right side
    528.15x = 380,262.28
  5. Step 5: Solve for x
    x = 380,262.28/528.15
  6. Step 6: Final answer
    x = 719.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.