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Finding the Fourth Proportional to 538.96, 743.70 and 306.10

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Solution

The fourth proportional to 538.96, 743.70 and 306.10 is: 422.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.96 : 743.70 = 306.10 : x
  2. Step 2: Convert to fraction form
    538.96/743.70 = 306.10/x
  3. Step 3: Cross multiply
    538.96x = 743.70 × 306.10
  4. Step 4: Simplify right side
    538.96x = 227,646.57
  5. Step 5: Solve for x
    x = 227,646.57/538.96
  6. Step 6: Final answer
    x = 422.38

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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.