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Finding the Fourth Proportional to 331.50, 497.34 and 316.20

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Solution

The fourth proportional to 331.50, 497.34 and 316.20 is: 474.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.50 : 497.34 = 316.20 : x
  2. Step 2: Convert to fraction form
    331.50/497.34 = 316.20/x
  3. Step 3: Cross multiply
    331.50x = 497.34 × 316.20
  4. Step 4: Simplify right side
    331.50x = 157,258.91
  5. Step 5: Solve for x
    x = 157,258.91/331.50
  6. Step 6: Final answer
    x = 474.39

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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.