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Finding the Fourth Proportional to 1,336.92, 2,004.52 and 642.68

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Solution

The fourth proportional to 1,336.92, 2,004.52 and 642.68 is: 963.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.92 : 2,004.52 = 642.68 : x
  2. Step 2: Convert to fraction form
    1,336.92/2,004.52 = 642.68/x
  3. Step 3: Cross multiply
    1,336.92x = 2,004.52 × 642.68
  4. Step 4: Simplify right side
    1,336.92x = 1,288,264.91
  5. Step 5: Solve for x
    x = 1,288,264.91/1,336.92
  6. Step 6: Final answer
    x = 963.61

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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.