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Finding the Fourth Proportional to 492.23, 679.32 and 342.86

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Solution

The fourth proportional to 492.23, 679.32 and 342.86 is: 473.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.23 : 679.32 = 342.86 : x
  2. Step 2: Convert to fraction form
    492.23/679.32 = 342.86/x
  3. Step 3: Cross multiply
    492.23x = 679.32 × 342.86
  4. Step 4: Simplify right side
    492.23x = 232,912.07
  5. Step 5: Solve for x
    x = 232,912.07/492.23
  6. Step 6: Final answer
    x = 473.17

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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.