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Finding the Fourth Proportional to 1,336.91, 2,004.79 and 459.50

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Solution

The fourth proportional to 1,336.91, 2,004.79 and 459.50 is: 689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.91 : 2,004.79 = 459.50 : x
  2. Step 2: Convert to fraction form
    1,336.91/2,004.79 = 459.50/x
  3. Step 3: Cross multiply
    1,336.91x = 2,004.79 × 459.50
  4. Step 4: Simplify right side
    1,336.91x = 921,190.98
  5. Step 5: Solve for x
    x = 921,190.98/1,336.91
  6. Step 6: Final answer
    x = 689.05

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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.