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Finding the Fourth Proportional to 644.85, 889.87 and 350.11

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Solution

The fourth proportional to 644.85, 889.87 and 350.11 is: 483.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.85 : 889.87 = 350.11 : x
  2. Step 2: Convert to fraction form
    644.85/889.87 = 350.11/x
  3. Step 3: Cross multiply
    644.85x = 889.87 × 350.11
  4. Step 4: Simplify right side
    644.85x = 311,551.29
  5. Step 5: Solve for x
    x = 311,551.29/644.85
  6. Step 6: Final answer
    x = 483.14

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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.