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Finding the Fourth Proportional to 662.88, 993.95 and 316.29

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Solution

The fourth proportional to 662.88, 993.95 and 316.29 is: 474.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.88 : 993.95 = 316.29 : x
  2. Step 2: Convert to fraction form
    662.88/993.95 = 316.29/x
  3. Step 3: Cross multiply
    662.88x = 993.95 × 316.29
  4. Step 4: Simplify right side
    662.88x = 314,376.45
  5. Step 5: Solve for x
    x = 314,376.45/662.88
  6. Step 6: Final answer
    x = 474.26

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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.