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Finding the Fourth Proportional to 436.40, 654.40 and 162.47

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Solution

The fourth proportional to 436.40, 654.40 and 162.47 is: 243.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.40 : 654.40 = 162.47 : x
  2. Step 2: Convert to fraction form
    436.40/654.40 = 162.47/x
  3. Step 3: Cross multiply
    436.40x = 654.40 × 162.47
  4. Step 4: Simplify right side
    436.40x = 106,321.29
  5. Step 5: Solve for x
    x = 106,321.29/436.40
  6. Step 6: Final answer
    x = 243.63

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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.