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Finding the Fourth Proportional to 2,958.86, 4,438.22 and 767.56

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Solution

The fourth proportional to 2,958.86, 4,438.22 and 767.56 is: 1,151.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,958.86 : 4,438.22 = 767.56 : x
  2. Step 2: Convert to fraction form
    2,958.86/4,438.22 = 767.56/x
  3. Step 3: Cross multiply
    2,958.86x = 4,438.22 × 767.56
  4. Step 4: Simplify right side
    2,958.86x = 3,406,600.14
  5. Step 5: Solve for x
    x = 3,406,600.14/2,958.86
  6. Step 6: Final answer
    x = 1,151.32

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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.