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Finding the Fourth Proportional to 552.09, 761.90 and 331.35

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Solution

The fourth proportional to 552.09, 761.90 and 331.35 is: 457.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.09 : 761.90 = 331.35 : x
  2. Step 2: Convert to fraction form
    552.09/761.90 = 331.35/x
  3. Step 3: Cross multiply
    552.09x = 761.90 × 331.35
  4. Step 4: Simplify right side
    552.09x = 252,455.57
  5. Step 5: Solve for x
    x = 252,455.57/552.09
  6. Step 6: Final answer
    x = 457.27

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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.