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Finding the Fourth Proportional to 538.76, 743.54 and 328.90

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Solution

The fourth proportional to 538.76, 743.54 and 328.90 is: 453.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.76 : 743.54 = 328.90 : x
  2. Step 2: Convert to fraction form
    538.76/743.54 = 328.90/x
  3. Step 3: Cross multiply
    538.76x = 743.54 × 328.90
  4. Step 4: Simplify right side
    538.76x = 244,550.31
  5. Step 5: Solve for x
    x = 244,550.31/538.76
  6. Step 6: Final answer
    x = 453.91

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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.