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Finding the Fourth Proportional to 436.43, 654.43 and 253.88

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Solution

The fourth proportional to 436.43, 654.43 and 253.88 is: 380.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.43 : 654.43 = 253.88 : x
  2. Step 2: Convert to fraction form
    436.43/654.43 = 253.88/x
  3. Step 3: Cross multiply
    436.43x = 654.43 × 253.88
  4. Step 4: Simplify right side
    436.43x = 166,143.42
  5. Step 5: Solve for x
    x = 166,143.42/436.43
  6. Step 6: Final answer
    x = 380.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.