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Finding the Fourth Proportional to 667.33, 920.91 and 372.58

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Solution

The fourth proportional to 667.33, 920.91 and 372.58 is: 514.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.33 : 920.91 = 372.58 : x
  2. Step 2: Convert to fraction form
    667.33/920.91 = 372.58/x
  3. Step 3: Cross multiply
    667.33x = 920.91 × 372.58
  4. Step 4: Simplify right side
    667.33x = 343,112.65
  5. Step 5: Solve for x
    x = 343,112.65/667.33
  6. Step 6: Final answer
    x = 514.16

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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.