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Finding the Fourth Proportional to 671.64, 927.01 and 450.78

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Solution

The fourth proportional to 671.64, 927.01 and 450.78 is: 622.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.64 : 927.01 = 450.78 : x
  2. Step 2: Convert to fraction form
    671.64/927.01 = 450.78/x
  3. Step 3: Cross multiply
    671.64x = 927.01 × 450.78
  4. Step 4: Simplify right side
    671.64x = 417,877.57
  5. Step 5: Solve for x
    x = 417,877.57/671.64
  6. Step 6: Final answer
    x = 622.17

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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.