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Finding the Fourth Proportional to 644.96, 890.00 and 350.22

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Solution

The fourth proportional to 644.96, 890.00 and 350.22 is: 483.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.96 : 890.00 = 350.22 : x
  2. Step 2: Convert to fraction form
    644.96/890.00 = 350.22/x
  3. Step 3: Cross multiply
    644.96x = 890.00 × 350.22
  4. Step 4: Simplify right side
    644.96x = 311,700.67
  5. Step 5: Solve for x
    x = 311,700.67/644.96
  6. Step 6: Final answer
    x = 483.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.