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Finding the Fourth Proportional to 665.19, 997.78 and 232.45

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Solution

The fourth proportional to 665.19, 997.78 and 232.45 is: 348.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.19 : 997.78 = 232.45 : x
  2. Step 2: Convert to fraction form
    665.19/997.78 = 232.45/x
  3. Step 3: Cross multiply
    665.19x = 997.78 × 232.45
  4. Step 4: Simplify right side
    665.19x = 231,933.96
  5. Step 5: Solve for x
    x = 231,933.96/665.19
  6. Step 6: Final answer
    x = 348.67

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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.