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Finding the Fourth Proportional to 626.26, 864.03 and 405.49

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Solution

The fourth proportional to 626.26, 864.03 and 405.49 is: 559.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.26 : 864.03 = 405.49 : x
  2. Step 2: Convert to fraction form
    626.26/864.03 = 405.49/x
  3. Step 3: Cross multiply
    626.26x = 864.03 × 405.49
  4. Step 4: Simplify right side
    626.26x = 350,355.52
  5. Step 5: Solve for x
    x = 350,355.52/626.26
  6. Step 6: Final answer
    x = 559.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.