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Finding the Fourth Proportional to 505.09, 757.62 and 212.52

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Solution

The fourth proportional to 505.09, 757.62 and 212.52 is: 318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.09 : 757.62 = 212.52 : x
  2. Step 2: Convert to fraction form
    505.09/757.62 = 212.52/x
  3. Step 3: Cross multiply
    505.09x = 757.62 × 212.52
  4. Step 4: Simplify right side
    505.09x = 161,009.40
  5. Step 5: Solve for x
    x = 161,009.40/505.09
  6. Step 6: Final answer
    x = 318.77

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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.