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Finding the Fourth Proportional to 321.05, 484.14 and 316.71

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Solution

The fourth proportional to 321.05, 484.14 and 316.71 is: 477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.05 : 484.14 = 316.71 : x
  2. Step 2: Convert to fraction form
    321.05/484.14 = 316.71/x
  3. Step 3: Cross multiply
    321.05x = 484.14 × 316.71
  4. Step 4: Simplify right side
    321.05x = 153,331.98
  5. Step 5: Solve for x
    x = 153,331.98/321.05
  6. Step 6: Final answer
    x = 477.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.