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Finding the Fourth Proportional to 644.10, 888.86 and 349.37

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Solution

The fourth proportional to 644.10, 888.86 and 349.37 is: 482.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.10 : 888.86 = 349.37 : x
  2. Step 2: Convert to fraction form
    644.10/888.86 = 349.37/x
  3. Step 3: Cross multiply
    644.10x = 888.86 × 349.37
  4. Step 4: Simplify right side
    644.10x = 310,536.14
  5. Step 5: Solve for x
    x = 310,536.14/644.10
  6. Step 6: Final answer
    x = 482.12

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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.