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Finding the Fourth Proportional to 475.61, 712.94 and 321.17

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Solution

The fourth proportional to 475.61, 712.94 and 321.17 is: 481.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.61 : 712.94 = 321.17 : x
  2. Step 2: Convert to fraction form
    475.61/712.94 = 321.17/x
  3. Step 3: Cross multiply
    475.61x = 712.94 × 321.17
  4. Step 4: Simplify right side
    475.61x = 228,969.77
  5. Step 5: Solve for x
    x = 228,969.77/475.61
  6. Step 6: Final answer
    x = 481.43

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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.