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Finding the Fourth Proportional to 671.69, 926.79 and 376.90

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Solution

The fourth proportional to 671.69, 926.79 and 376.90 is: 520.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.69 : 926.79 = 376.90 : x
  2. Step 2: Convert to fraction form
    671.69/926.79 = 376.90/x
  3. Step 3: Cross multiply
    671.69x = 926.79 × 376.90
  4. Step 4: Simplify right side
    671.69x = 349,307.15
  5. Step 5: Solve for x
    x = 349,307.15/671.69
  6. Step 6: Final answer
    x = 520.04

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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.