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Finding the Fourth Proportional to 1,227.91, 1,841.69 and 406.19

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Solution

The fourth proportional to 1,227.91, 1,841.69 and 406.19 is: 609.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.91 : 1,841.69 = 406.19 : x
  2. Step 2: Convert to fraction form
    1,227.91/1,841.69 = 406.19/x
  3. Step 3: Cross multiply
    1,227.91x = 1,841.69 × 406.19
  4. Step 4: Simplify right side
    1,227.91x = 748,074.03
  5. Step 5: Solve for x
    x = 748,074.03/1,227.91
  6. Step 6: Final answer
    x = 609.22

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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.