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Finding the Fourth Proportional to 662.99, 993.92 and 316.16

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Solution

The fourth proportional to 662.99, 993.92 and 316.16 is: 473.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.99 : 993.92 = 316.16 : x
  2. Step 2: Convert to fraction form
    662.99/993.92 = 316.16/x
  3. Step 3: Cross multiply
    662.99x = 993.92 × 316.16
  4. Step 4: Simplify right side
    662.99x = 314,231.20
  5. Step 5: Solve for x
    x = 314,231.20/662.99
  6. Step 6: Final answer
    x = 473.96

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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.