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Finding the Fourth Proportional to 672.05, 927.09 and 475.76

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Solution

The fourth proportional to 672.05, 927.09 and 475.76 is: 656.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.05 : 927.09 = 475.76 : x
  2. Step 2: Convert to fraction form
    672.05/927.09 = 475.76/x
  3. Step 3: Cross multiply
    672.05x = 927.09 × 475.76
  4. Step 4: Simplify right side
    672.05x = 441,067.70
  5. Step 5: Solve for x
    x = 441,067.70/672.05
  6. Step 6: Final answer
    x = 656.31

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1.5x scale

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.