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Finding the Fourth Proportional to 667.93, 921.77 and 373.21

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Solution

The fourth proportional to 667.93, 921.77 and 373.21 is: 515.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.93 : 921.77 = 373.21 : x
  2. Step 2: Convert to fraction form
    667.93/921.77 = 373.21/x
  3. Step 3: Cross multiply
    667.93x = 921.77 × 373.21
  4. Step 4: Simplify right side
    667.93x = 344,013.78
  5. Step 5: Solve for x
    x = 344,013.78/667.93
  6. Step 6: Final answer
    x = 515.04

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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.