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Finding the Fourth Proportional to 662.34, 992.57 and 487.64

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Solution

The fourth proportional to 662.34, 992.57 and 487.64 is: 730.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.34 : 992.57 = 487.64 : x
  2. Step 2: Convert to fraction form
    662.34/992.57 = 487.64/x
  3. Step 3: Cross multiply
    662.34x = 992.57 × 487.64
  4. Step 4: Simplify right side
    662.34x = 484,010.53
  5. Step 5: Solve for x
    x = 484,010.53/662.34
  6. Step 6: Final answer
    x = 730.76

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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.