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Finding the Fourth Proportional to 505.92, 758.80 and 217.28

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Solution

The fourth proportional to 505.92, 758.80 and 217.28 is: 325.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.92 : 758.80 = 217.28 : x
  2. Step 2: Convert to fraction form
    505.92/758.80 = 217.28/x
  3. Step 3: Cross multiply
    505.92x = 758.80 × 217.28
  4. Step 4: Simplify right side
    505.92x = 164,872.06
  5. Step 5: Solve for x
    x = 164,872.06/505.92
  6. Step 6: Final answer
    x = 325.89

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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.