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Finding the Fourth Proportional to 645.73, 968.59 and 438.83

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Solution

The fourth proportional to 645.73, 968.59 and 438.83 is: 658.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.73 : 968.59 = 438.83 : x
  2. Step 2: Convert to fraction form
    645.73/968.59 = 438.83/x
  3. Step 3: Cross multiply
    645.73x = 968.59 × 438.83
  4. Step 4: Simplify right side
    645.73x = 425,046.35
  5. Step 5: Solve for x
    x = 425,046.35/645.73
  6. Step 6: Final answer
    x = 658.24

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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.