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Finding the Fourth Proportional to 528.66, 793.26 and 385.56

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Solution

The fourth proportional to 528.66, 793.26 and 385.56 is: 578.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.66 : 793.26 = 385.56 : x
  2. Step 2: Convert to fraction form
    528.66/793.26 = 385.56/x
  3. Step 3: Cross multiply
    528.66x = 793.26 × 385.56
  4. Step 4: Simplify right side
    528.66x = 305,849.33
  5. Step 5: Solve for x
    x = 305,849.33/528.66
  6. Step 6: Final answer
    x = 578.54

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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.