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Finding the Fourth Proportional to 620.45, 929.05 and 331.01

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Solution

The fourth proportional to 620.45, 929.05 and 331.01 is: 495.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.45 : 929.05 = 331.01 : x
  2. Step 2: Convert to fraction form
    620.45/929.05 = 331.01/x
  3. Step 3: Cross multiply
    620.45x = 929.05 × 331.01
  4. Step 4: Simplify right side
    620.45x = 307,524.84
  5. Step 5: Solve for x
    x = 307,524.84/620.45
  6. Step 6: Final answer
    x = 495.65

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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.