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Finding the Fourth Proportional to 1,333.38, 2,000.38 and 409.07

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Solution

The fourth proportional to 1,333.38, 2,000.38 and 409.07 is: 613.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.38 : 2,000.38 = 409.07 : x
  2. Step 2: Convert to fraction form
    1,333.38/2,000.38 = 409.07/x
  3. Step 3: Cross multiply
    1,333.38x = 2,000.38 × 409.07
  4. Step 4: Simplify right side
    1,333.38x = 818,295.45
  5. Step 5: Solve for x
    x = 818,295.45/1,333.38
  6. Step 6: Final answer
    x = 613.70

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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.