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Finding the Fourth Proportional to 436.31, 654.64 and 192.88

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Solution

The fourth proportional to 436.31, 654.64 and 192.88 is: 289.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.31 : 654.64 = 192.88 : x
  2. Step 2: Convert to fraction form
    436.31/654.64 = 192.88/x
  3. Step 3: Cross multiply
    436.31x = 654.64 × 192.88
  4. Step 4: Simplify right side
    436.31x = 126,266.96
  5. Step 5: Solve for x
    x = 126,266.96/436.31
  6. Step 6: Final answer
    x = 289.40

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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.