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Finding the Fourth Proportional to 671.28, 926.36 and 376.55

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Solution

The fourth proportional to 671.28, 926.36 and 376.55 is: 519.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.28 : 926.36 = 376.55 : x
  2. Step 2: Convert to fraction form
    671.28/926.36 = 376.55/x
  3. Step 3: Cross multiply
    671.28x = 926.36 × 376.55
  4. Step 4: Simplify right side
    671.28x = 348,814.34
  5. Step 5: Solve for x
    x = 348,814.34/671.28
  6. Step 6: Final answer
    x = 519.63

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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.