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Finding the Fourth Proportional to 531.91, 792.37 and 515.79

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Solution

The fourth proportional to 531.91, 792.37 and 515.79 is: 768.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.91 : 792.37 = 515.79 : x
  2. Step 2: Convert to fraction form
    531.91/792.37 = 515.79/x
  3. Step 3: Cross multiply
    531.91x = 792.37 × 515.79
  4. Step 4: Simplify right side
    531.91x = 408,696.52
  5. Step 5: Solve for x
    x = 408,696.52/531.91
  6. Step 6: Final answer
    x = 768.36

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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.