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Finding the Fourth Proportional to 409.52, 614.37 and 135.60

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Solution

The fourth proportional to 409.52, 614.37 and 135.60 is: 203.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.52 : 614.37 = 135.60 : x
  2. Step 2: Convert to fraction form
    409.52/614.37 = 135.60/x
  3. Step 3: Cross multiply
    409.52x = 614.37 × 135.60
  4. Step 4: Simplify right side
    409.52x = 83,304.82
  5. Step 5: Solve for x
    x = 83,304.82/409.52
  6. Step 6: Final answer
    x = 203.42

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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.