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Finding the Fourth Proportional to 418.43, 626.91 and 356.94

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Solution

The fourth proportional to 418.43, 626.91 and 356.94 is: 534.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.43 : 626.91 = 356.94 : x
  2. Step 2: Convert to fraction form
    418.43/626.91 = 356.94/x
  3. Step 3: Cross multiply
    418.43x = 626.91 × 356.94
  4. Step 4: Simplify right side
    418.43x = 223,767.92
  5. Step 5: Solve for x
    x = 223,767.92/418.43
  6. Step 6: Final answer
    x = 534.78

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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.