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Finding the Fourth Proportional to 644.90, 889.96 and 350.16

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Solution

The fourth proportional to 644.90, 889.96 and 350.16 is: 483.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.90 : 889.96 = 350.16 : x
  2. Step 2: Convert to fraction form
    644.90/889.96 = 350.16/x
  3. Step 3: Cross multiply
    644.90x = 889.96 × 350.16
  4. Step 4: Simplify right side
    644.90x = 311,628.39
  5. Step 5: Solve for x
    x = 311,628.39/644.90
  6. Step 6: Final answer
    x = 483.22

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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.