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Finding the Fourth Proportional to 505.61, 757.87 and 213.03

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Solution

The fourth proportional to 505.61, 757.87 and 213.03 is: 319.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.61 : 757.87 = 213.03 : x
  2. Step 2: Convert to fraction form
    505.61/757.87 = 213.03/x
  3. Step 3: Cross multiply
    505.61x = 757.87 × 213.03
  4. Step 4: Simplify right side
    505.61x = 161,449.05
  5. Step 5: Solve for x
    x = 161,449.05/505.61
  6. Step 6: Final answer
    x = 319.32

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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.