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Finding the Fourth Proportional to 270.80, 406.38 and 116.87

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Solution

The fourth proportional to 270.80, 406.38 and 116.87 is: 175.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.80 : 406.38 = 116.87 : x
  2. Step 2: Convert to fraction form
    270.80/406.38 = 116.87/x
  3. Step 3: Cross multiply
    270.80x = 406.38 × 116.87
  4. Step 4: Simplify right side
    270.80x = 47,491.60
  5. Step 5: Solve for x
    x = 47,491.60/270.80
  6. Step 6: Final answer
    x = 175.38

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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.