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Finding the Fourth Proportional to 531.89, 796.46 and 427.28

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Solution

The fourth proportional to 531.89, 796.46 and 427.28 is: 639.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.89 : 796.46 = 427.28 : x
  2. Step 2: Convert to fraction form
    531.89/796.46 = 427.28/x
  3. Step 3: Cross multiply
    531.89x = 796.46 × 427.28
  4. Step 4: Simplify right side
    531.89x = 340,305.31
  5. Step 5: Solve for x
    x = 340,305.31/531.89
  6. Step 6: Final answer
    x = 639.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.