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Finding the Fourth Proportional to 671.64, 926.78 and 376.86

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Solution

The fourth proportional to 671.64, 926.78 and 376.86 is: 520.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.64 : 926.78 = 376.86 : x
  2. Step 2: Convert to fraction form
    671.64/926.78 = 376.86/x
  3. Step 3: Cross multiply
    671.64x = 926.78 × 376.86
  4. Step 4: Simplify right side
    671.64x = 349,266.31
  5. Step 5: Solve for x
    x = 349,266.31/671.64
  6. Step 6: Final answer
    x = 520.02

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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.