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Finding the Fourth Proportional to 667.11, 919.71 and 467.67

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Solution

The fourth proportional to 667.11, 919.71 and 467.67 is: 644.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.11 : 919.71 = 467.67 : x
  2. Step 2: Convert to fraction form
    667.11/919.71 = 467.67/x
  3. Step 3: Cross multiply
    667.11x = 919.71 × 467.67
  4. Step 4: Simplify right side
    667.11x = 430,120.78
  5. Step 5: Solve for x
    x = 430,120.78/667.11
  6. Step 6: Final answer
    x = 644.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.