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Finding the Fourth Proportional to 671.64, 926.90 and 376.92

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Solution

The fourth proportional to 671.64, 926.90 and 376.92 is: 520.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.64 : 926.90 = 376.92 : x
  2. Step 2: Convert to fraction form
    671.64/926.90 = 376.92/x
  3. Step 3: Cross multiply
    671.64x = 926.90 × 376.92
  4. Step 4: Simplify right side
    671.64x = 349,367.15
  5. Step 5: Solve for x
    x = 349,367.15/671.64
  6. Step 6: Final answer
    x = 520.17

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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.