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Finding the Fourth Proportional to 469.46, 704.22 and 144.78

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Solution

The fourth proportional to 469.46, 704.22 and 144.78 is: 217.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.46 : 704.22 = 144.78 : x
  2. Step 2: Convert to fraction form
    469.46/704.22 = 144.78/x
  3. Step 3: Cross multiply
    469.46x = 704.22 × 144.78
  4. Step 4: Simplify right side
    469.46x = 101,956.97
  5. Step 5: Solve for x
    x = 101,956.97/469.46
  6. Step 6: Final answer
    x = 217.18

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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.