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Finding the Fourth Proportional to 495.91, 743.26 and 386.56

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Solution

The fourth proportional to 495.91, 743.26 and 386.56 is: 579.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.91 : 743.26 = 386.56 : x
  2. Step 2: Convert to fraction form
    495.91/743.26 = 386.56/x
  3. Step 3: Cross multiply
    495.91x = 743.26 × 386.56
  4. Step 4: Simplify right side
    495.91x = 287,314.59
  5. Step 5: Solve for x
    x = 287,314.59/495.91
  6. Step 6: Final answer
    x = 579.37

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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.