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Finding the Fourth Proportional to 667.49, 920.97 and 383.94

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Solution

The fourth proportional to 667.49, 920.97 and 383.94 is: 529.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.49 : 920.97 = 383.94 : x
  2. Step 2: Convert to fraction form
    667.49/920.97 = 383.94/x
  3. Step 3: Cross multiply
    667.49x = 920.97 × 383.94
  4. Step 4: Simplify right side
    667.49x = 353,597.22
  5. Step 5: Solve for x
    x = 353,597.22/667.49
  6. Step 6: Final answer
    x = 529.74

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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.