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Finding the Fourth Proportional to 528.60, 729.26 and 331.77

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Solution

The fourth proportional to 528.60, 729.26 and 331.77 is: 457.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.60 : 729.26 = 331.77 : x
  2. Step 2: Convert to fraction form
    528.60/729.26 = 331.77/x
  3. Step 3: Cross multiply
    528.60x = 729.26 × 331.77
  4. Step 4: Simplify right side
    528.60x = 241,946.59
  5. Step 5: Solve for x
    x = 241,946.59/528.60
  6. Step 6: Final answer
    x = 457.71

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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.