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Finding the Fourth Proportional to 270.95, 406.50 and 140.91

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Solution

The fourth proportional to 270.95, 406.50 and 140.91 is: 211.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.95 : 406.50 = 140.91 : x
  2. Step 2: Convert to fraction form
    270.95/406.50 = 140.91/x
  3. Step 3: Cross multiply
    270.95x = 406.50 × 140.91
  4. Step 4: Simplify right side
    270.95x = 57,279.92
  5. Step 5: Solve for x
    x = 57,279.92/270.95
  6. Step 6: Final answer
    x = 211.41

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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.