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Finding the Fourth Proportional to 3,642.69, 5,461.68 and 1,998.78

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Solution

The fourth proportional to 3,642.69, 5,461.68 and 1,998.78 is: 2,996.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,642.69 : 5,461.68 = 1,998.78 : x
  2. Step 2: Convert to fraction form
    3,642.69/5,461.68 = 1,998.78/x
  3. Step 3: Cross multiply
    3,642.69x = 5,461.68 × 1,998.78
  4. Step 4: Simplify right side
    3,642.69x = 10,916,696.75
  5. Step 5: Solve for x
    x = 10,916,696.75/3,642.69
  6. Step 6: Final answer
    x = 2,996.88

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1.5x scale

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.