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Finding the Fourth Proportional to 667.45, 921.08 and 372.73

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Solution

The fourth proportional to 667.45, 921.08 and 372.73 is: 514.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.45 : 921.08 = 372.73 : x
  2. Step 2: Convert to fraction form
    667.45/921.08 = 372.73/x
  3. Step 3: Cross multiply
    667.45x = 921.08 × 372.73
  4. Step 4: Simplify right side
    667.45x = 343,312.31
  5. Step 5: Solve for x
    x = 343,312.31/667.45
  6. Step 6: Final answer
    x = 514.37

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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.