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Finding the Fourth Proportional to 650.72, 977.90 and 326.31

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Solution

The fourth proportional to 650.72, 977.90 and 326.31 is: 490.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.72 : 977.90 = 326.31 : x
  2. Step 2: Convert to fraction form
    650.72/977.90 = 326.31/x
  3. Step 3: Cross multiply
    650.72x = 977.90 × 326.31
  4. Step 4: Simplify right side
    650.72x = 319,096.92
  5. Step 5: Solve for x
    x = 319,096.92/650.72
  6. Step 6: Final answer
    x = 490.38

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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.