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Finding the Fourth Proportional to 829.81, 1,144.71 and 672.62

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Solution

The fourth proportional to 829.81, 1,144.71 and 672.62 is: 927.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.81 : 1,144.71 = 672.62 : x
  2. Step 2: Convert to fraction form
    829.81/1,144.71 = 672.62/x
  3. Step 3: Cross multiply
    829.81x = 1,144.71 × 672.62
  4. Step 4: Simplify right side
    829.81x = 769,957.70
  5. Step 5: Solve for x
    x = 769,957.70/829.81
  6. Step 6: Final answer
    x = 927.87

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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.