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Finding the Fourth Proportional to 146.76, 219.80 and 142.88

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Solution

The fourth proportional to 146.76, 219.80 and 142.88 is: 213.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.76 : 219.80 = 142.88 : x
  2. Step 2: Convert to fraction form
    146.76/219.80 = 142.88/x
  3. Step 3: Cross multiply
    146.76x = 219.80 × 142.88
  4. Step 4: Simplify right side
    146.76x = 31,405.02
  5. Step 5: Solve for x
    x = 31,405.02/146.76
  6. Step 6: Final answer
    x = 213.99

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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.