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Finding the Fourth Proportional to 528.92, 789.05 and 442.79

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Solution

The fourth proportional to 528.92, 789.05 and 442.79 is: 660.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.92 : 789.05 = 442.79 : x
  2. Step 2: Convert to fraction form
    528.92/789.05 = 442.79/x
  3. Step 3: Cross multiply
    528.92x = 789.05 × 442.79
  4. Step 4: Simplify right side
    528.92x = 349,383.45
  5. Step 5: Solve for x
    x = 349,383.45/528.92
  6. Step 6: Final answer
    x = 660.56

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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.