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Finding the Fourth Proportional to 662.95, 994.43 and 316.32

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Solution

The fourth proportional to 662.95, 994.43 and 316.32 is: 474.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.95 : 994.43 = 316.32 : x
  2. Step 2: Convert to fraction form
    662.95/994.43 = 316.32/x
  3. Step 3: Cross multiply
    662.95x = 994.43 × 316.32
  4. Step 4: Simplify right side
    662.95x = 314,555.16
  5. Step 5: Solve for x
    x = 314,555.16/662.95
  6. Step 6: Final answer
    x = 474.48

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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.