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Finding the Fourth Proportional to 298.76, 447.53 and 144.21

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Solution

The fourth proportional to 298.76, 447.53 and 144.21 is: 216.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.76 : 447.53 = 144.21 : x
  2. Step 2: Convert to fraction form
    298.76/447.53 = 144.21/x
  3. Step 3: Cross multiply
    298.76x = 447.53 × 144.21
  4. Step 4: Simplify right side
    298.76x = 64,539.26
  5. Step 5: Solve for x
    x = 64,539.26/298.76
  6. Step 6: Final answer
    x = 216.03

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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.