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Finding the Fourth Proportional to 372.46, 512.94 and 289.42

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Solution

The fourth proportional to 372.46, 512.94 and 289.42 is: 398.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.46 : 512.94 = 289.42 : x
  2. Step 2: Convert to fraction form
    372.46/512.94 = 289.42/x
  3. Step 3: Cross multiply
    372.46x = 512.94 × 289.42
  4. Step 4: Simplify right side
    372.46x = 148,455.09
  5. Step 5: Solve for x
    x = 148,455.09/372.46
  6. Step 6: Final answer
    x = 398.58

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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.