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Finding the Fourth Proportional to 796.28, 1,192.31 and 429.94

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Solution

The fourth proportional to 796.28, 1,192.31 and 429.94 is: 643.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.28 : 1,192.31 = 429.94 : x
  2. Step 2: Convert to fraction form
    796.28/1,192.31 = 429.94/x
  3. Step 3: Cross multiply
    796.28x = 1,192.31 × 429.94
  4. Step 4: Simplify right side
    796.28x = 512,613.65
  5. Step 5: Solve for x
    x = 512,613.65/796.28
  6. Step 6: Final answer
    x = 643.76

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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.