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Finding the Fourth Proportional to 418.95, 626.76 and 272.34

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Solution

The fourth proportional to 418.95, 626.76 and 272.34 is: 407.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.95 : 626.76 = 272.34 : x
  2. Step 2: Convert to fraction form
    418.95/626.76 = 272.34/x
  3. Step 3: Cross multiply
    418.95x = 626.76 × 272.34
  4. Step 4: Simplify right side
    418.95x = 170,691.82
  5. Step 5: Solve for x
    x = 170,691.82/418.95
  6. Step 6: Final answer
    x = 407.43

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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.