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Finding the Fourth Proportional to 403.63, 553.37 and 396.34

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Solution

The fourth proportional to 403.63, 553.37 and 396.34 is: 543.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.63 : 553.37 = 396.34 : x
  2. Step 2: Convert to fraction form
    403.63/553.37 = 396.34/x
  3. Step 3: Cross multiply
    403.63x = 553.37 × 396.34
  4. Step 4: Simplify right side
    403.63x = 219,322.67
  5. Step 5: Solve for x
    x = 219,322.67/403.63
  6. Step 6: Final answer
    x = 543.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.