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Finding the Fourth Proportional to 671.68, 926.90 and 376.94

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Solution

The fourth proportional to 671.68, 926.90 and 376.94 is: 520.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.68 : 926.90 = 376.94 : x
  2. Step 2: Convert to fraction form
    671.68/926.90 = 376.94/x
  3. Step 3: Cross multiply
    671.68x = 926.90 × 376.94
  4. Step 4: Simplify right side
    671.68x = 349,381.05
  5. Step 5: Solve for x
    x = 349,381.05/671.68
  6. Step 6: Final answer
    x = 520.16

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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.