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Finding the Fourth Proportional to 492.86, 679.12 and 335.22

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Solution

The fourth proportional to 492.86, 679.12 and 335.22 is: 461.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.86 : 679.12 = 335.22 : x
  2. Step 2: Convert to fraction form
    492.86/679.12 = 335.22/x
  3. Step 3: Cross multiply
    492.86x = 679.12 × 335.22
  4. Step 4: Simplify right side
    492.86x = 227,653.60
  5. Step 5: Solve for x
    x = 227,653.60/492.86
  6. Step 6: Final answer
    x = 461.90

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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.