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Finding the Fourth Proportional to 792.24, 1,092.72 and 512.79

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Solution

The fourth proportional to 792.24, 1,092.72 and 512.79 is: 707.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.24 : 1,092.72 = 512.79 : x
  2. Step 2: Convert to fraction form
    792.24/1,092.72 = 512.79/x
  3. Step 3: Cross multiply
    792.24x = 1,092.72 × 512.79
  4. Step 4: Simplify right side
    792.24x = 560,335.89
  5. Step 5: Solve for x
    x = 560,335.89/792.24
  6. Step 6: Final answer
    x = 707.28

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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.