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Finding the Fourth Proportional to 671.43, 927.53 and 639.03

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Solution

The fourth proportional to 671.43, 927.53 and 639.03 is: 882.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.43 : 927.53 = 639.03 : x
  2. Step 2: Convert to fraction form
    671.43/927.53 = 639.03/x
  3. Step 3: Cross multiply
    671.43x = 927.53 × 639.03
  4. Step 4: Simplify right side
    671.43x = 592,716.30
  5. Step 5: Solve for x
    x = 592,716.30/671.43
  6. Step 6: Final answer
    x = 882.77

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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.