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Finding the Fourth Proportional to 644.76, 967.95 and 439.83

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Solution

The fourth proportional to 644.76, 967.95 and 439.83 is: 660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.76 : 967.95 = 439.83 : x
  2. Step 2: Convert to fraction form
    644.76/967.95 = 439.83/x
  3. Step 3: Cross multiply
    644.76x = 967.95 × 439.83
  4. Step 4: Simplify right side
    644.76x = 425,733.45
  5. Step 5: Solve for x
    x = 425,733.45/644.76
  6. Step 6: Final answer
    x = 660.30

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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.