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Finding the Fourth Proportional to 401.02, 553.19 and 243.56

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Solution

The fourth proportional to 401.02, 553.19 and 243.56 is: 335.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.02 : 553.19 = 243.56 : x
  2. Step 2: Convert to fraction form
    401.02/553.19 = 243.56/x
  3. Step 3: Cross multiply
    401.02x = 553.19 × 243.56
  4. Step 4: Simplify right side
    401.02x = 134,735.12
  5. Step 5: Solve for x
    x = 134,735.12/401.02
  6. Step 6: Final answer
    x = 335.98

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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.