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Finding the Fourth Proportional to 270.87, 406.21 and 88.21

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Solution

The fourth proportional to 270.87, 406.21 and 88.21 is: 132.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.87 : 406.21 = 88.21 : x
  2. Step 2: Convert to fraction form
    270.87/406.21 = 88.21/x
  3. Step 3: Cross multiply
    270.87x = 406.21 × 88.21
  4. Step 4: Simplify right side
    270.87x = 35,831.78
  5. Step 5: Solve for x
    x = 35,831.78/270.87
  6. Step 6: Final answer
    x = 132.29

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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.