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Finding the Fourth Proportional to 644.07, 963.71 and 384.21

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Solution

The fourth proportional to 644.07, 963.71 and 384.21 is: 574.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.07 : 963.71 = 384.21 : x
  2. Step 2: Convert to fraction form
    644.07/963.71 = 384.21/x
  3. Step 3: Cross multiply
    644.07x = 963.71 × 384.21
  4. Step 4: Simplify right side
    644.07x = 370,265.10
  5. Step 5: Solve for x
    x = 370,265.10/644.07
  6. Step 6: Final answer
    x = 574.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.