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Finding the Fourth Proportional to 528.56, 729.34 and 353.96

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Solution

The fourth proportional to 528.56, 729.34 and 353.96 is: 488.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.56 : 729.34 = 353.96 : x
  2. Step 2: Convert to fraction form
    528.56/729.34 = 353.96/x
  3. Step 3: Cross multiply
    528.56x = 729.34 × 353.96
  4. Step 4: Simplify right side
    528.56x = 258,157.19
  5. Step 5: Solve for x
    x = 258,157.19/528.56
  6. Step 6: Final answer
    x = 488.42

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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.