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Finding the Fourth Proportional to 1,333.26, 2,000.28 and 408.90

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Solution

The fourth proportional to 1,333.26, 2,000.28 and 408.90 is: 613.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.26 : 2,000.28 = 408.90 : x
  2. Step 2: Convert to fraction form
    1,333.26/2,000.28 = 408.90/x
  3. Step 3: Cross multiply
    1,333.26x = 2,000.28 × 408.90
  4. Step 4: Simplify right side
    1,333.26x = 817,914.49
  5. Step 5: Solve for x
    x = 817,914.49/1,333.26
  6. Step 6: Final answer
    x = 613.47

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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.