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Finding the Fourth Proportional to 1,333.69, 2,000.75 and 409.39

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Solution

The fourth proportional to 1,333.69, 2,000.75 and 409.39 is: 614.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.69 : 2,000.75 = 409.39 : x
  2. Step 2: Convert to fraction form
    1,333.69/2,000.75 = 409.39/x
  3. Step 3: Cross multiply
    1,333.69x = 2,000.75 × 409.39
  4. Step 4: Simplify right side
    1,333.69x = 819,079.99
  5. Step 5: Solve for x
    x = 819,079.99/1,333.69
  6. Step 6: Final answer
    x = 614.15

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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.