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Finding the Fourth Proportional to 662.59, 993.22 and 315.96

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Solution

The fourth proportional to 662.59, 993.22 and 315.96 is: 473.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.59 : 993.22 = 315.96 : x
  2. Step 2: Convert to fraction form
    662.59/993.22 = 315.96/x
  3. Step 3: Cross multiply
    662.59x = 993.22 × 315.96
  4. Step 4: Simplify right side
    662.59x = 313,817.79
  5. Step 5: Solve for x
    x = 313,817.79/662.59
  6. Step 6: Final answer
    x = 473.62

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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.