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Finding the Fourth Proportional to 1,229.79, 1,841.49 and 681.33

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Solution

The fourth proportional to 1,229.79, 1,841.49 and 681.33 is: 1,020.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.79 : 1,841.49 = 681.33 : x
  2. Step 2: Convert to fraction form
    1,229.79/1,841.49 = 681.33/x
  3. Step 3: Cross multiply
    1,229.79x = 1,841.49 × 681.33
  4. Step 4: Simplify right side
    1,229.79x = 1,254,662.38
  5. Step 5: Solve for x
    x = 1,254,662.38/1,229.79
  6. Step 6: Final answer
    x = 1,020.22

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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.