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Finding the Fourth Proportional to 662.80, 993.90 and 354.59

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Solution

The fourth proportional to 662.80, 993.90 and 354.59 is: 531.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.80 : 993.90 = 354.59 : x
  2. Step 2: Convert to fraction form
    662.80/993.90 = 354.59/x
  3. Step 3: Cross multiply
    662.80x = 993.90 × 354.59
  4. Step 4: Simplify right side
    662.80x = 352,427.00
  5. Step 5: Solve for x
    x = 352,427.00/662.80
  6. Step 6: Final answer
    x = 531.73

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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.