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Finding the Fourth Proportional to 505.82, 758.97 and 213.28

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Solution

The fourth proportional to 505.82, 758.97 and 213.28 is: 320.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.82 : 758.97 = 213.28 : x
  2. Step 2: Convert to fraction form
    505.82/758.97 = 213.28/x
  3. Step 3: Cross multiply
    505.82x = 758.97 × 213.28
  4. Step 4: Simplify right side
    505.82x = 161,871.22
  5. Step 5: Solve for x
    x = 161,871.22/505.82
  6. Step 6: Final answer
    x = 320.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.