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Finding the Fourth Proportional to 528.08, 728.82 and 331.85

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Solution

The fourth proportional to 528.08, 728.82 and 331.85 is: 458.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.08 : 728.82 = 331.85 : x
  2. Step 2: Convert to fraction form
    528.08/728.82 = 331.85/x
  3. Step 3: Cross multiply
    528.08x = 728.82 × 331.85
  4. Step 4: Simplify right side
    528.08x = 241,861.24
  5. Step 5: Solve for x
    x = 241,861.24/528.08
  6. Step 6: Final answer
    x = 458.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.