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Finding the Fourth Proportional to 792.02, 1,092.26 and 492.88

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Solution

The fourth proportional to 792.02, 1,092.26 and 492.88 is: 679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.02 : 1,092.26 = 492.88 : x
  2. Step 2: Convert to fraction form
    792.02/1,092.26 = 492.88/x
  3. Step 3: Cross multiply
    792.02x = 1,092.26 × 492.88
  4. Step 4: Simplify right side
    792.02x = 538,353.11
  5. Step 5: Solve for x
    x = 538,353.11/792.02
  6. Step 6: Final answer
    x = 679.72

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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.