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Finding the Fourth Proportional to 1,336.71, 2,004.32 and 412.01

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Solution

The fourth proportional to 1,336.71, 2,004.32 and 412.01 is: 617.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.71 : 2,004.32 = 412.01 : x
  2. Step 2: Convert to fraction form
    1,336.71/2,004.32 = 412.01/x
  3. Step 3: Cross multiply
    1,336.71x = 2,004.32 × 412.01
  4. Step 4: Simplify right side
    1,336.71x = 825,789.86
  5. Step 5: Solve for x
    x = 825,789.86/1,336.71
  6. Step 6: Final answer
    x = 617.78

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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.