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Finding the Fourth Proportional to 671.76, 927.86 and 476.15

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Solution

The fourth proportional to 671.76, 927.86 and 476.15 is: 657.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.76 : 927.86 = 476.15 : x
  2. Step 2: Convert to fraction form
    671.76/927.86 = 476.15/x
  3. Step 3: Cross multiply
    671.76x = 927.86 × 476.15
  4. Step 4: Simplify right side
    671.76x = 441,793.52
  5. Step 5: Solve for x
    x = 441,793.52/671.76
  6. Step 6: Final answer
    x = 657.67

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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.