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Finding the Fourth Proportional to 298.75, 447.55 and 144.29

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Solution

The fourth proportional to 298.75, 447.55 and 144.29 is: 216.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.75 : 447.55 = 144.29 : x
  2. Step 2: Convert to fraction form
    298.75/447.55 = 144.29/x
  3. Step 3: Cross multiply
    298.75x = 447.55 × 144.29
  4. Step 4: Simplify right side
    298.75x = 64,576.99
  5. Step 5: Solve for x
    x = 64,576.99/298.75
  6. Step 6: Final answer
    x = 216.16

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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.