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Finding the Fourth Proportional to 538.40, 742.08 and 361.04

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Solution

The fourth proportional to 538.40, 742.08 and 361.04 is: 497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.40 : 742.08 = 361.04 : x
  2. Step 2: Convert to fraction form
    538.40/742.08 = 361.04/x
  3. Step 3: Cross multiply
    538.40x = 742.08 × 361.04
  4. Step 4: Simplify right side
    538.40x = 267,920.56
  5. Step 5: Solve for x
    x = 267,920.56/538.40
  6. Step 6: Final answer
    x = 497.62

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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.