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Finding the Fourth Proportional to 671.20, 926.20 and 376.50

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Solution

The fourth proportional to 671.20, 926.20 and 376.50 is: 519.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.20 : 926.20 = 376.50 : x
  2. Step 2: Convert to fraction form
    671.20/926.20 = 376.50/x
  3. Step 3: Cross multiply
    671.20x = 926.20 × 376.50
  4. Step 4: Simplify right side
    671.20x = 348,714.30
  5. Step 5: Solve for x
    x = 348,714.30/671.20
  6. Step 6: Final answer
    x = 519.54

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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.