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Finding the Fourth Proportional to 492.22, 679.17 and 282.36

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Solution

The fourth proportional to 492.22, 679.17 and 282.36 is: 389.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.22 : 679.17 = 282.36 : x
  2. Step 2: Convert to fraction form
    492.22/679.17 = 282.36/x
  3. Step 3: Cross multiply
    492.22x = 679.17 × 282.36
  4. Step 4: Simplify right side
    492.22x = 191,771.50
  5. Step 5: Solve for x
    x = 191,771.50/492.22
  6. Step 6: Final answer
    x = 389.61

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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.