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Finding the Fourth Proportional to 667.39, 919.89 and 446.26

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Solution

The fourth proportional to 667.39, 919.89 and 446.26 is: 615.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.39 : 919.89 = 446.26 : x
  2. Step 2: Convert to fraction form
    667.39/919.89 = 446.26/x
  3. Step 3: Cross multiply
    667.39x = 919.89 × 446.26
  4. Step 4: Simplify right side
    667.39x = 410,503.28
  5. Step 5: Solve for x
    x = 410,503.28/667.39
  6. Step 6: Final answer
    x = 615.09

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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.