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Finding the Fourth Proportional to 538.60, 742.62 and 414.40

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Solution

The fourth proportional to 538.60, 742.62 and 414.40 is: 571.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.60 : 742.62 = 414.40 : x
  2. Step 2: Convert to fraction form
    538.60/742.62 = 414.40/x
  3. Step 3: Cross multiply
    538.60x = 742.62 × 414.40
  4. Step 4: Simplify right side
    538.60x = 307,741.73
  5. Step 5: Solve for x
    x = 307,741.73/538.60
  6. Step 6: Final answer
    x = 571.37

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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.