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Finding the Fourth Proportional to 492.54, 679.78 and 335.40

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Solution

The fourth proportional to 492.54, 679.78 and 335.40 is: 462.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.54 : 679.78 = 335.40 : x
  2. Step 2: Convert to fraction form
    492.54/679.78 = 335.40/x
  3. Step 3: Cross multiply
    492.54x = 679.78 × 335.40
  4. Step 4: Simplify right side
    492.54x = 227,998.21
  5. Step 5: Solve for x
    x = 227,998.21/492.54
  6. Step 6: Final answer
    x = 462.90

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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.