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Finding the Fourth Proportional to 1,212.24, 1,673.68 and 798.48

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Solution

The fourth proportional to 1,212.24, 1,673.68 and 798.48 is: 1,102.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.24 : 1,673.68 = 798.48 : x
  2. Step 2: Convert to fraction form
    1,212.24/1,673.68 = 798.48/x
  3. Step 3: Cross multiply
    1,212.24x = 1,673.68 × 798.48
  4. Step 4: Simplify right side
    1,212.24x = 1,336,400.01
  5. Step 5: Solve for x
    x = 1,336,400.01/1,212.24
  6. Step 6: Final answer
    x = 1,102.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.