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Finding the Fourth Proportional to 436.07, 654.80 and 253.59

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Solution

The fourth proportional to 436.07, 654.80 and 253.59 is: 380.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.07 : 654.80 = 253.59 : x
  2. Step 2: Convert to fraction form
    436.07/654.80 = 253.59/x
  3. Step 3: Cross multiply
    436.07x = 654.80 × 253.59
  4. Step 4: Simplify right side
    436.07x = 166,049.46
  5. Step 5: Solve for x
    x = 166,049.46/436.07
  6. Step 6: Final answer
    x = 380.79

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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.