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Finding the Fourth Proportional to 354.22, 530.86 and 331.12

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Solution

The fourth proportional to 354.22, 530.86 and 331.12 is: 496.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.22 : 530.86 = 331.12 : x
  2. Step 2: Convert to fraction form
    354.22/530.86 = 331.12/x
  3. Step 3: Cross multiply
    354.22x = 530.86 × 331.12
  4. Step 4: Simplify right side
    354.22x = 175,778.36
  5. Step 5: Solve for x
    x = 175,778.36/354.22
  6. Step 6: Final answer
    x = 496.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.