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Finding the Fourth Proportional to 665.53, 996.56 and 480.42

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Solution

The fourth proportional to 665.53, 996.56 and 480.42 is: 719.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.53 : 996.56 = 480.42 : x
  2. Step 2: Convert to fraction form
    665.53/996.56 = 480.42/x
  3. Step 3: Cross multiply
    665.53x = 996.56 × 480.42
  4. Step 4: Simplify right side
    665.53x = 478,767.36
  5. Step 5: Solve for x
    x = 478,767.36/665.53
  6. Step 6: Final answer
    x = 719.38

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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.