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Finding the Fourth Proportional to 665.64, 998.43 and 178.67

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Solution

The fourth proportional to 665.64, 998.43 and 178.67 is: 267.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.64 : 998.43 = 178.67 : x
  2. Step 2: Convert to fraction form
    665.64/998.43 = 178.67/x
  3. Step 3: Cross multiply
    665.64x = 998.43 × 178.67
  4. Step 4: Simplify right side
    665.64x = 178,384.50
  5. Step 5: Solve for x
    x = 178,384.50/665.64
  6. Step 6: Final answer
    x = 267.99

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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.