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Finding the Fourth Proportional to 489.45, 675.39 and 292.96

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Solution

The fourth proportional to 489.45, 675.39 and 292.96 is: 404.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.45 : 675.39 = 292.96 : x
  2. Step 2: Convert to fraction form
    489.45/675.39 = 292.96/x
  3. Step 3: Cross multiply
    489.45x = 675.39 × 292.96
  4. Step 4: Simplify right side
    489.45x = 197,861.66
  5. Step 5: Solve for x
    x = 197,861.66/489.45
  6. Step 6: Final answer
    x = 404.25

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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.