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Finding the Fourth Proportional to 1,976.99, 2,965.47 and 516.14

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Solution

The fourth proportional to 1,976.99, 2,965.47 and 516.14 is: 774.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.99 : 2,965.47 = 516.14 : x
  2. Step 2: Convert to fraction form
    1,976.99/2,965.47 = 516.14/x
  3. Step 3: Cross multiply
    1,976.99x = 2,965.47 × 516.14
  4. Step 4: Simplify right side
    1,976.99x = 1,530,582.86
  5. Step 5: Solve for x
    x = 1,530,582.86/1,976.99
  6. Step 6: Final answer
    x = 774.20

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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.