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Finding the Fourth Proportional to 531.31, 791.52 and 511.72

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Solution

The fourth proportional to 531.31, 791.52 and 511.72 is: 762.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.31 : 791.52 = 511.72 : x
  2. Step 2: Convert to fraction form
    531.31/791.52 = 511.72/x
  3. Step 3: Cross multiply
    531.31x = 791.52 × 511.72
  4. Step 4: Simplify right side
    531.31x = 405,035.60
  5. Step 5: Solve for x
    x = 405,035.60/531.31
  6. Step 6: Final answer
    x = 762.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.