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Finding the Fourth Proportional to 528.35, 728.84 and 331.99

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Solution

The fourth proportional to 528.35, 728.84 and 331.99 is: 457.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.35 : 728.84 = 331.99 : x
  2. Step 2: Convert to fraction form
    528.35/728.84 = 331.99/x
  3. Step 3: Cross multiply
    528.35x = 728.84 × 331.99
  4. Step 4: Simplify right side
    528.35x = 241,966.60
  5. Step 5: Solve for x
    x = 241,966.60/528.35
  6. Step 6: Final answer
    x = 457.97

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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.