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Finding the Fourth Proportional to 667.59, 921.29 and 372.89

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Solution

The fourth proportional to 667.59, 921.29 and 372.89 is: 514.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.59 : 921.29 = 372.89 : x
  2. Step 2: Convert to fraction form
    667.59/921.29 = 372.89/x
  3. Step 3: Cross multiply
    667.59x = 921.29 × 372.89
  4. Step 4: Simplify right side
    667.59x = 343,533.36
  5. Step 5: Solve for x
    x = 343,533.36/667.59
  6. Step 6: Final answer
    x = 514.59

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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.