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Finding the Fourth Proportional to 3,338.91, 5,009.94 and 1,489.86

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Solution

The fourth proportional to 3,338.91, 5,009.94 and 1,489.86 is: 2,235.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,338.91 : 5,009.94 = 1,489.86 : x
  2. Step 2: Convert to fraction form
    3,338.91/5,009.94 = 1,489.86/x
  3. Step 3: Cross multiply
    3,338.91x = 5,009.94 × 1,489.86
  4. Step 4: Simplify right side
    3,338.91x = 7,464,109.21
  5. Step 5: Solve for x
    x = 7,464,109.21/3,338.91
  6. Step 6: Final answer
    x = 2,235.49

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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.