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Finding the Fourth Proportional to 538.41, 743.04 and 305.55

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Solution

The fourth proportional to 538.41, 743.04 and 305.55 is: 421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.41 : 743.04 = 305.55 : x
  2. Step 2: Convert to fraction form
    538.41/743.04 = 305.55/x
  3. Step 3: Cross multiply
    538.41x = 743.04 × 305.55
  4. Step 4: Simplify right side
    538.41x = 227,035.87
  5. Step 5: Solve for x
    x = 227,035.87/538.41
  6. Step 6: Final answer
    x = 421.68

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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.