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Finding the Fourth Proportional to 402.66, 556.40 and 323.82

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Solution

The fourth proportional to 402.66, 556.40 and 323.82 is: 447.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.66 : 556.40 = 323.82 : x
  2. Step 2: Convert to fraction form
    402.66/556.40 = 323.82/x
  3. Step 3: Cross multiply
    402.66x = 556.40 × 323.82
  4. Step 4: Simplify right side
    402.66x = 180,174.26
  5. Step 5: Solve for x
    x = 180,174.26/402.66
  6. Step 6: Final answer
    x = 447.46

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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.