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Finding the Fourth Proportional to 400.55, 552.80 and 245.21

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Solution

The fourth proportional to 400.55, 552.80 and 245.21 is: 338.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.55 : 552.80 = 245.21 : x
  2. Step 2: Convert to fraction form
    400.55/552.80 = 245.21/x
  3. Step 3: Cross multiply
    400.55x = 552.80 × 245.21
  4. Step 4: Simplify right side
    400.55x = 135,549.94
  5. Step 5: Solve for x
    x = 135,549.94/400.55
  6. Step 6: Final answer
    x = 338.41

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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.