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Finding the Fourth Proportional to 667.67, 921.63 and 471.44

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Solution

The fourth proportional to 667.67, 921.63 and 471.44 is: 650.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.67 : 921.63 = 471.44 : x
  2. Step 2: Convert to fraction form
    667.67/921.63 = 471.44/x
  3. Step 3: Cross multiply
    667.67x = 921.63 × 471.44
  4. Step 4: Simplify right side
    667.67x = 434,488.64
  5. Step 5: Solve for x
    x = 434,488.64/667.67
  6. Step 6: Final answer
    x = 650.76

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1.5x scale

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.