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Finding the Fourth Proportional to 664.29, 995.49 and 489.58

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Solution

The fourth proportional to 664.29, 995.49 and 489.58 is: 733.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.29 : 995.49 = 489.58 : x
  2. Step 2: Convert to fraction form
    664.29/995.49 = 489.58/x
  3. Step 3: Cross multiply
    664.29x = 995.49 × 489.58
  4. Step 4: Simplify right side
    664.29x = 487,371.40
  5. Step 5: Solve for x
    x = 487,371.40/664.29
  6. Step 6: Final answer
    x = 733.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.