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Finding the Fourth Proportional to 829.93, 1,244.94 and 213.65

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Solution

The fourth proportional to 829.93, 1,244.94 and 213.65 is: 320.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.93 : 1,244.94 = 213.65 : x
  2. Step 2: Convert to fraction form
    829.93/1,244.94 = 213.65/x
  3. Step 3: Cross multiply
    829.93x = 1,244.94 × 213.65
  4. Step 4: Simplify right side
    829.93x = 265,986.08
  5. Step 5: Solve for x
    x = 265,986.08/829.93
  6. Step 6: Final answer
    x = 320.49

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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.