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Finding the Fourth Proportional to 644.08, 888.83 and 378.47

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Solution

The fourth proportional to 644.08, 888.83 and 378.47 is: 522.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.08 : 888.83 = 378.47 : x
  2. Step 2: Convert to fraction form
    644.08/888.83 = 378.47/x
  3. Step 3: Cross multiply
    644.08x = 888.83 × 378.47
  4. Step 4: Simplify right side
    644.08x = 336,395.49
  5. Step 5: Solve for x
    x = 336,395.49/644.08
  6. Step 6: Final answer
    x = 522.29

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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.