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Finding the Fourth Proportional to 409.44, 614.18 and 272.40

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Solution

The fourth proportional to 409.44, 614.18 and 272.40 is: 408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.44 : 614.18 = 272.40 : x
  2. Step 2: Convert to fraction form
    409.44/614.18 = 272.40/x
  3. Step 3: Cross multiply
    409.44x = 614.18 × 272.40
  4. Step 4: Simplify right side
    409.44x = 167,302.63
  5. Step 5: Solve for x
    x = 167,302.63/409.44
  6. Step 6: Final answer
    x = 408.61

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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.