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Finding the Fourth Proportional to 671.64, 926.86 and 376.91

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Solution

The fourth proportional to 671.64, 926.86 and 376.91 is: 520.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.64 : 926.86 = 376.91 : x
  2. Step 2: Convert to fraction form
    671.64/926.86 = 376.91/x
  3. Step 3: Cross multiply
    671.64x = 926.86 × 376.91
  4. Step 4: Simplify right side
    671.64x = 349,340.11
  5. Step 5: Solve for x
    x = 349,340.11/671.64
  6. Step 6: Final answer
    x = 520.13

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.