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Finding the Fourth Proportional to 665.36, 997.07 and 490.64

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Solution

The fourth proportional to 665.36, 997.07 and 490.64 is: 735.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.36 : 997.07 = 490.64 : x
  2. Step 2: Convert to fraction form
    665.36/997.07 = 490.64/x
  3. Step 3: Cross multiply
    665.36x = 997.07 × 490.64
  4. Step 4: Simplify right side
    665.36x = 489,202.42
  5. Step 5: Solve for x
    x = 489,202.42/665.36
  6. Step 6: Final answer
    x = 735.25

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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.