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Finding the Fourth Proportional to 298.23, 447.23 and 143.88

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Solution

The fourth proportional to 298.23, 447.23 and 143.88 is: 215.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.23 : 447.23 = 143.88 : x
  2. Step 2: Convert to fraction form
    298.23/447.23 = 143.88/x
  3. Step 3: Cross multiply
    298.23x = 447.23 × 143.88
  4. Step 4: Simplify right side
    298.23x = 64,347.45
  5. Step 5: Solve for x
    x = 64,347.45/298.23
  6. Step 6: Final answer
    x = 215.76

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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.