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Finding the Fourth Proportional to 662.76, 993.76 and 320.76

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Solution

The fourth proportional to 662.76, 993.76 and 320.76 is: 480.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.76 : 993.76 = 320.76 : x
  2. Step 2: Convert to fraction form
    662.76/993.76 = 320.76/x
  3. Step 3: Cross multiply
    662.76x = 993.76 × 320.76
  4. Step 4: Simplify right side
    662.76x = 318,758.46
  5. Step 5: Solve for x
    x = 318,758.46/662.76
  6. Step 6: Final answer
    x = 480.96

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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.