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Finding the Fourth Proportional to 505.36, 757.86 and 343.18

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Solution

The fourth proportional to 505.36, 757.86 and 343.18 is: 514.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.36 : 757.86 = 343.18 : x
  2. Step 2: Convert to fraction form
    505.36/757.86 = 343.18/x
  3. Step 3: Cross multiply
    505.36x = 757.86 × 343.18
  4. Step 4: Simplify right side
    505.36x = 260,082.39
  5. Step 5: Solve for x
    x = 260,082.39/505.36
  6. Step 6: Final answer
    x = 514.65

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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.