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Finding the Fourth Proportional to 665.12, 996.82 and 340.60

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Solution

The fourth proportional to 665.12, 996.82 and 340.60 is: 510.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.12 : 996.82 = 340.60 : x
  2. Step 2: Convert to fraction form
    665.12/996.82 = 340.60/x
  3. Step 3: Cross multiply
    665.12x = 996.82 × 340.60
  4. Step 4: Simplify right side
    665.12x = 339,516.89
  5. Step 5: Solve for x
    x = 339,516.89/665.12
  6. Step 6: Final answer
    x = 510.46

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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.