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Finding the Fourth Proportional to 492.94, 679.54 and 345.11

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Solution

The fourth proportional to 492.94, 679.54 and 345.11 is: 475.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.94 : 679.54 = 345.11 : x
  2. Step 2: Convert to fraction form
    492.94/679.54 = 345.11/x
  3. Step 3: Cross multiply
    492.94x = 679.54 × 345.11
  4. Step 4: Simplify right side
    492.94x = 234,516.05
  5. Step 5: Solve for x
    x = 234,516.05/492.94
  6. Step 6: Final answer
    x = 475.75

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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.