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Finding the Fourth Proportional to 331.61, 499.85 and 313.97

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Solution

The fourth proportional to 331.61, 499.85 and 313.97 is: 473.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.61 : 499.85 = 313.97 : x
  2. Step 2: Convert to fraction form
    331.61/499.85 = 313.97/x
  3. Step 3: Cross multiply
    331.61x = 499.85 × 313.97
  4. Step 4: Simplify right side
    331.61x = 156,935.01
  5. Step 5: Solve for x
    x = 156,935.01/331.61
  6. Step 6: Final answer
    x = 473.26

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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.