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Finding the Fourth Proportional to 538.12, 743.43 and 414.28

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Solution

The fourth proportional to 538.12, 743.43 and 414.28 is: 572.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.12 : 743.43 = 414.28 : x
  2. Step 2: Convert to fraction form
    538.12/743.43 = 414.28/x
  3. Step 3: Cross multiply
    538.12x = 743.43 × 414.28
  4. Step 4: Simplify right side
    538.12x = 307,988.18
  5. Step 5: Solve for x
    x = 307,988.18/538.12
  6. Step 6: Final answer
    x = 572.34

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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.